Câu hỏi: These drugs are the best medicine available as a treatment at the moment, ............ they are expensive, unfortunately.

A. although

B. because

C. so

Câu 1: This factory produces some of .............. cameras in the world.

A. best

B. the best

C. the most best

Câu 2: ................  I can’t go to the conference as I’ve got to do to Sydney on business.

A. Frankly 

B. Unfortunately 

C. Personally

Câu 3: The charity is trying to find ways tosave and ............ the world’sendangered animal species. 

A. the charity is trying to find ways to protect

B. to find ways to protect

C. protect

Câu 4: ………… people live in the countrysidethan 100 years ago.

A. Less

B. Few

C. Fewer

Câu 5: I can’t pick you up from the station onWednesday because ............ on thatday.

A. I’m fixing my car

B. I’m having my car fixed

C. I need my car fixed

Câu 6: What ........... in order to get a permitto work in your country?

A. do I need to do

B. must I do

C. ought I do