Câu hỏi: ………… people live in the countrysidethan 100 years ago.

A. Less

B. Few

C. Fewer

Câu 1: Do you have any knowledge …………….how our education system works?

A. of

B. on

C. for

Câu 2: Many children these days do not have ahealthy diet................ is possible thatthis is because less healthy foods are cheaper than healthy ones. 

A. What

B. That

C. It

Câu 3: I’m aiming ........... a band 7 in IELTS.

A. on

B. for

C. to

Câu 4: ................  I can’t go to the conference as I’ve got to do to Sydney on business.

A. Frankly 

B. Unfortunately 

C. Personally

Câu 5: When you write your essays you ............. copy ideas from books without referencing them properly.

A. mustn’t

B. don’t have to.

C. have to

Câu 6: Scientists finally ............... find a curefor the disease after years of research.

A. managed to

B. can

C. could