Câu hỏi: Commercial centers are ................ they were many years ago.

A. as popular than

B. the most popular

C. the most popular than

D. more popular than

Câu 1: John always .................... his car in the lot by the school.

A. park

B. parks

C. is parked

D. was parked

Câu 2: Choose the correct answer to fill in the blank. 

A. that are

B. being

C. are

D. are being

Câu 3: I ..................... you a copy of the article tomorrow.

A. send

B. was sending

C. will send

D. will be sent

Câu 4: In 1849, Walter Hunt, ...................... American inventor, patented a designthat served as the basis for modem safety pins.

A. an

B. he was an

C. who

D. was an

Câu 5: Willa Cather, ....................... a prominent American writer, grew up in Nebraska during the early farming years. 

A. who became

B. became

C. she became

D. it is she who became

Câu 6: Computers are considered as .................... tools today.

A. the most modern

B. more modern

C. modern as

D. much modern than