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: There are many different ways of comparing the culture of one nation with those of another.

A. There are

B. of comparing

C. those

D. another

Câu 2: It is believed that in the near future robots will be used to doing things such as cooking.

A. it is believed

B. in the near future

C. be used to cooking

D. such as

Câu 3: It is the recommendation of many psychologists that a learner ought to use mental images to associate word and remember them.

A. recommendation

B. ought to use

C. to associate word

D. remember them

Câu 4: I can’t find the letter I received from my boss some days ago. I might throw it into the waste paper bin yesterday.

A. received

B. can’t find

C. into the

D. might throw

Câu 5: Building thousands of years ago, the ancient palace is popular with modern tourists.

A. building

B. ago

C. the ancient 

D. popular with

Câu 6: 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