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: For the first time in the history of the country, the person which was recommended by the president to replace a retiring justice on the Supreme Court is a woman.

A. which

B. was recommended

C. to replace

D. retiring

Câu 2: A warning printed on a makeshift lifebuoy says: “This is not a life-saving device. Children should be accompany by their parents.”

A. printed

B. makeshift lifebuoy

C. device

D. accompany

Câu 3: Some people often say that using cars is not as convenient than using motorbikes.

A. some

B. say

C. than

D. is

Câu 4: He has made a lot of mistakes in his writing because his carelessness.

A. made

B. mistakes

C. in

D. because

Câu 5: 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 6: When many of my friends take a shower in the morning, I usually take one before bed.

A. When

B. many of my friends

C. one

D. before bed