1. Timmy doesn’t do well in school ___ his inability to concentrate on any one thing for longer than a minute or two.

   • B. due to

2. After ___ 45 minutes of an extremely boring speech, I found myself nodding off.

   • C. listening

3. Why did I stay until the end? I am going to stay and watch a bad movie again! ___ In that situation, I’m going to leave the theater immediately.

   • A. The next time

4. “Why aren’t you ready to go?” “I’m ready.” “How can that be? It’s freezing outside, you’re wearing shorts and a T-shirt!”

   • C. but

5. Erin likes to swim, jog, and ___ tennis.

   • B. play

6. Since ___ to a warmer and less humid climate, I’ve had no trouble with my asthma.

   • C. moving

7. Tony spent ___ money buying movie tickets that he didn’t have enough left to buy a soft drink.

• C. too much

1. I get back from my last business trip, I’m taking a few days off.

• A. Once

1. Citrus growers become anxious about losing their fragile crop of oranges ___ it gets near freezing in Florida.

• D. whenever

1. Before ___ a promotion and transfer to another city, I will discuss it at length with my whole staff to be sure that everyone will be able to adjust to the change.

• C. accepting

1. You should learn how to change a tire on your car ___ you can handle an emergency situation if necessary.

• A. so that

1. Cars have become much more complicated, ___ mechanics need more training than in the past.

• B. Therefore

1. Not wanting to be late my first day of class, ___ to school after I missed my bus.

• C. I ran

1. It was raining ___ I couldn’t go outside.

• B. so hard that

1. The Northern Hemisphere has mostly westerly winds ___ the rotation of the earth toward the east.

• A. due to

1. Great white sharks are dangerous to ___ will attack without warning.

• D. humans. They

1. ___ the need to finish this project soon, I want you to work on this overtime for the next few days.

• C. Because of

Sentence 4:
 * Correct answer: C. because
 * Reasoning: We need a reason why Tawny doesn't do well in school, and "because his inability to concentrate" provides that reason.
Sentence 5:
 * Correct answer: C. listening
 * Reasoning: "After listening" indicates the action that happened before nodding off.
Sentence 6:
 * Correct answer: A. The next time
 * Reasoning: The speaker is expressing their intention for future movie-watching experiences.
Sentence 7:
 * Correct answer: C. because
 * Reasoning: The person is questioning how the other can be ready to go despite the cold weather, and "because" introduces the reason.
Sentence 8:
 * Correct answer: C. to play
 * Reasoning: "likes to swim, jog, and to play tennis" is a parallel structure, indicating that Erin enjoys playing tennis.
Sentence 10:
 * Correct answer: D. so much
 * Reasoning: "so much" emphasizes the quantity of money spent, leading to the inability to buy a drink or candy bar.
Sentence 11:
 * Correct answer: A. Once
 * Reasoning: "Once I get back" indicates a single event in the future.
Sentence 12:
 * Correct answer: D. whenever
 * Reasoning: "whenever the temperature gets near freezing" expresses a repeated occurrence.
Sentence 13:
 * Correct answer: B. accepted
 * Reasoning: The promotion has already happened, so the correct form is the past participle "accepted."
Sentence 14:
 * Correct answer: A. so that
 * Reasoning: "so that" introduces the purpose of learning how to change a tire.
Sentence 15:
 * Correct answer: A. Because
 * Reasoning: "Because" introduces the reason why mechanics need more training.
Sentence 16:
 * Correct answer: B. Therefore
 * Reasoning: "Therefore" indicates a result or consequence of the previous statement.

Sentence 17:
 * Correct answer: B. so hard that
 * Reasoning: "So hard that" is used to express a result that is caused by a high degree of something. The rain was so hard that the person couldn't go outside.
Sentence 18:
 * Correct answer: A. due to
 * Reasoning: "Due to" means "because of." The westerly winds in the Northern Hemisphere are caused by the rotation of the Earth.
Sentence 19:
 * Correct answer: D. humans. They
 * Reasoning: This option provides a complete and grammatically correct sentence. It clearly states that great white sharks are dangerous to humans and that they will attack without warning.
Sentence 20:
 * Correct answer: C. Because of
 * Reasoning: "Because of" introduces a reason. The speaker wants the person to work overtime because of the need to finish the project.