Câu hỏi: In the early 1900's, Pennsylvania's industries grew rapidly, a growth sometimes accompanied by disputes labor.

A. the early 1900’s

B. industries

C. accompanied by

D. labor

Câu 1: When mining for gold, you must first obtain the gold ore and then apart the gold from the ore.

A. When mining

B. must first

C. and then

D. apart

Câu 2: Because blood from different individuals may different in the type of antigen on the surface of the red cells and the type of antibody in the plasma, a dangerous reaction can occur between the donor and recipient in a blood transfusion.

A. Because

B. different

C. can occur

D. and

Câu 3: Although Nam worked very hard, but he didn’t pass the final exam.

A. Although

B. hard

C. didn’t

D. pass

Câu 4: If you need to keep fit, then why not take on a sport such as badminton or tennis?

A. to keep

B. why not take

C. on

D. a sport such as

Câu 5: 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

Câu 6: Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically.

A. became extinct

B. because of

C. The earth’s

D. drastically