Câu hỏi: My elder sisters, both of them were doctors, said they were too busy to pick me up.

A. elder

B. both of them

C. too busy 

D. to pick

Câu 1: My sister told me that she had met my teacher at the supermarket yesterday.

A. My sister told

B. had met

C. at the supermarket 

D. yesterday

Câu 2: The most visible remind of the close relationship between the United States and France is the famous Statue of Liberty, which stands in New York habor.

A. remind

B. between

C. is

D. which

Câu 3: Ancient people made a clay pottery because they needed it for their survival.

A. a clay pottery

B. because

C. it

D. their survival

Câu 4: My teacher is very strict and he always makes us to finish all the exercises before leaving school.

A. is

B. strict

C. to finish

D. leaving school

Câu 5: If you take the train, it would be much more convenient.

A. if

B. the train

C. would be

D. much

Câu 6: Proteins are made up of folded irregularly chains, the links of which are amino acids.

A. made up of

B. folded irregularly

C. the links

D. which