Câu hỏi: Manufacturers may use food additives for preserving, to color, or to flavor, or to fortify foods.

A. may use

B. for preserving

C. to flavor

D. to fortify

Câu 1: Passengers are required to arrive to the gate fifteen minutes before departure time.

A. are required

B. to arrive to

C. before

D. departure time

Câu 2: Bill is often late for class, which makes his teachers angrily.

A. Bill is often

B. for

C. which

D. angrily

Câu 3: I enjoy reading the article that you told me about it yesterday.

A. reading

B. that

C. told

D. it

Câu 4: I think she will be suitable for the work because she has been working like a teacher for a long time.

A. will be

B. for

C. has been working 

D. like

Câu 5: For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

A. man

B. sweet-smelling

C. using them

D. or

Câu 6: Generally, Europe and Asia are regarded as being distinct continents, but they are simply vast geography divisions of the larger lad mass known as Eurasia.

A. Generally

B. are regarded

C. vast geography

D. known as