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

A. an/  X/  the

B. an/  the/  the

C. X/  X/  the

D. X/  X/  X

Câu 2: ...........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 3: Rita plays .......... violin and her sister plays .......... guitar.

A. the/  X

B. the/ a

C. the/  the

D. X/  X

Câu 4: Please give me ...........cup of coffee with........... cream and ........... sugar.

A. a/  X/  X

B. a/  the/  the

C. X/ X/ X

D. X/  X/  a

Câu 5: Rita is studying........... English and ...........math this semester.

A. the/  X

B. X/  the

C. the/  the  

D. X/  X

Câu 6: ....... Statue of Liberty was a gift of friendship from France to ............ United States.

A. the/  X 

B. X/  the

C. the/  the

D. X/  X