Are these your keys? No, they. B. isn't Explanation: "Keys" is a plural noun, so it requires the plural form of the verb "to be," which is "are." The correct negation of "are" is "aren't" or "are not."

............... B. What Explanation: This question is asking for information about the best friend, which is a noun. "What" is the appropriate question word for asking about nouns.

My mother often............ B. gets up Explanation: The phrase "breakfast at 7.00" indicates a habitual action in the morning, which is best matched with the verb "gets up," indicating the action of waking up in the morning.

She................ goes shopping every Sunday. A. always Explanation: The adverb "always" indicates a habitual action that occurs regularly, such as going shopping every Sunday.

What do you ...............the Internet for? C. use Explanation: The question is asking for the purpose or function of the Internet in this context. "Use" is the appropriate verb to express this idea.

My father is ........ A. an Explanation: "Explorer" begins with a vowel sound, so it requires the indefinite article "an" before it.

There..... D. is Explanation: The subject "a big sofa" is singular, so it requires the singular form of the verb "to be," which is "is."

Let's go to the .............. I want some books. A. bookshop Explanation: The context suggests that the speaker wants to buy books, which indicates that they should go to a place where books are sold, which is a "bookshop."

....your father young or old? B. Is Explanation: This question is asking about the age of the father, which requires the verb "is" to match the subject "father."

I didn't........... B. go Explanation: The context suggests that the speaker did not visit any temples in Thailand. Therefore, the appropriate verb to complete the sentence is "go."

My father is. A. an Explanation: "Explorer" begins with a vowel sound, so it requires the indefinite article "an" before it.

There..... D. is Explanation: The subject "a big sofa" is singular, so it requires the singular form of the verb "to be," which is "is."

Let's go to the ............. A. bookshop Explanation: The context suggests that the speaker wants to buy books, which indicates that they should go to a place where books are sold, which is a "bookshop."

....your father young or old? B. Do Explanation: This question is asking about the age of the father, which requires the auxiliary verb "do" to form the question.

I didn't........... D. visit Explanation: The context suggests that the speaker did not visit any temples in Thailand. Therefore, the appropriate verb to complete the sentence is "visit."

Can I have.............. A. some Explanation: "Sugar" is a countable noun, so it requires the determiner "some" to indicate an unspecified quantity.

She is not going............everything for you. D. to do Explanation: The structure "to do everything" indicates the action that "she" is not going to perform for "you." Therefore, "to do" is the appropriate choice.