Câu hỏi: 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 1: I'm on night duty. When you go to ..............bed, I go to ............ work.

A. the/  X

B. X/  the

C. the/  the

D. X/  X

Câu 2: Rita is studying........... English and ...........math this semester.

A. the/  X

B. X/  the

C. the/  the  

D. X/  X

Câu 3: ......... chair which you are sitting in is broken.

A. a

B. an

C. the

D. x

Câu 4: David attended .......... Princeton University.

A. a

B. an

C. the

D. x

Câu 5: ...........Lake Erie is one of five Great Lakes in ........... North America

A. a/  X/  the 

B. a/  the/  the

C. X/ X/ X

D. X/  X/  a

Câu 6: 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