9. It takes a lot of...effort to understand these ideas:

C. physical

• The word “effort” typically refers to something physical or mental, but in this context, physical is the most appropriate choice.

10. Many people compliment Ha Noi on being a tourist destination...:

C. safe

• The correct adjective to describe a tourist destination in a positive way is safe.

II. Give the correct form of the verbs in brackets to complete the following sentences:

1. When I came home from work yesterday, my mother was cooking dinner.

   • (Past continuous tense)

2. Thành has been staying with his sister since yesterday.

   • (Present perfect continuous tense)

3. If you were not in a hurry, you may have a cup of tea now.

   • (Past simple tense after “If” in conditional sentences)

4. She asked me if I knew about the Shilin Stone Forest in China.

   • (Past simple tense)

5. He does not mind helping the people who are in need.

   • (Verb + gerund)

III. Identify the underlined word or phrase that must be changed to make the sentence correct:

1. She always asks me questionate, difficult to answer.
   Mistake: "questionate" → questions (A)

2. Do you know anybody whose wants to translate this novel into English?
   Mistake: "whose" → who (B)

3. He suggested going to Phong Nha Cave since it's one of famous natural wonder of Viet Nam.
   Mistake: "famous" → the famous (B)

4. He thinks that English is not as difficultthan maths.
   Mistake: "than" → as (C)

5. Despite she loves Maths, she has decided to become an English teacher.
   Mistake: "she" → her (A)

V. Read the passage and choose the best word to fill in each blank:

1. British English and American English (1) differ in some ways.

   • differ is the correct verb to use in this context.

2. The most remarkable difference between the two (2) is vocabulary.

   • is is the correct verb to link the subject and the complement.

3. Another difference between these two varieties of English is the (3) spelling.

   • spelling is the correct word in this context.