Câu hỏi: He has made a lot of mistakes in his writing because his carelessness.

A. made

B. mistakes

C. in

D. because

Câu 1: It was not until the end of prehistoric times that the first wheeled vehicles appearing

A. It was

B. prehistoric

C. wheeled vehicles

D. appearing

Câu 2: There is a severe famine in Somalia, and thousands of people are dying from hunger.

A. There is

B. thousands of people

C. are dying

D. from hunger

Câu 3: 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 4: I was amazed that Smith showed so few grief at his mother’s death.

A. was

B. amazed

C. showed

D. few

Câu 5: I like the fresh air and green trees of the village which I spent my vacation last year.

A. I like

B. which

C. spent

D. last

Câu 6: 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