Câu hỏi: How much times did Rich and Jennifer have to do the experiment?

A. much

B. did

C. have to

D. experiment

Câu 1: It was not when he talked to her that he knew the truth.

A. was not

B. when

C. talked to

D. knew the truth

Câu 2: There is a severe famine in Somalia, and thousands of people are dying from hunger.

A. There is

B. thousands of people

C. are dying

D. from hunger

Câu 3: Of all the art-related reference and research library in North America, that of the Metropolitan Museum of Art in New York City is among the largest and most complete.

A. Of all

B. reference and research

C. library

D. that of

Câu 4: Some people often say that using cars is not as convenient than using motorbikes.

A. some

B. say

C. than

D. is

Câu 5: Although Nam worked very hard, but he didn’t pass the final exam.

A. Although

B. hard

C. didn’t

D. pass

Câu 6: When precipitation occurs, some of it evaporates, some runs off the surface it strikes, and some sinking into the ground.

A. When

B. it

C. runs off

D. sinking