Câu hỏi: Scientists sent ............ expedition to ............ Mars during .......... 1990s.

A. an/  X/  the

B. an/  the/  the

C. X/  X/  the

D. X/  X/  X

Câu 1: John and Mary went to........... school yesterday and then studied in ........... library before returning home.

A. the/  X

B. X/  the

C. the / the

D. X/  X

Câu 2: David attended .......... Princeton University.

A. a

B. an

C. the

D. x

Câu 3: Sorry, I can't find the number. I remember writing it on ............. back of an envelop.

A. a

B. an

C. the

D. x

Câu 4: Mel's grandmother is in........... hospital,  so we went to visit her ............  last night.

A. the/  X

B. X/  the

C. the/  the

D. X/  X

Câu 5: ................ Mekong River is .............longest river in.................... Vietnam.

A. the/  X/  the

B. the/  the/  the

C. X/  X/  the

D. the/  the/  X

Câu 6: Rita is studying........... English and ...........math this semester.

A. the/  X

B. X/  the

C. the/  the  

D. X/  X