Câu hỏi: In the past we threw a lot of ourkitchen waste away, but today many items such as plastic bottles and newspapers .............. 

A. are recycled

B. recycle

C. need recycling

Câu 1: She got a terrible mark in the exam so she ........ very hard at all.

A. mustn’t have worked

B. can’t have worked

C. didn’t work

Câu 2: ………… people live in the countrysidethan 100 years ago.

A. Less

B. Few

C. Fewer

Câu 3: 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 4: Do you have any knowledge …………….how our education system works?

A. of

B. on

C. for

Câu 5: Scientists finally ............... find a curefor the disease after years of research.

A. managed to

B. can

C. could

Câu 6: These drugs are the best medicine available as a treatment at the moment, ............ they are expensive, unfortunately.

A. although

B. because

C. so