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: A recent government report has warnedthat ...................... we act immediately to reduce pollution, there will be serious consequences, for the planet.

A. provided that 

B. in case

C. unless

Câu 2: Doctors have ….........us to cut downon salt in our diets if we want to reduce the risk of getting heart disease.

A. insisted 

B. suggested

C. advised

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

A. of

B. on

C. for

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: I wish that man ....................... tapping hisfingers on the table. It’s reallyannoying me.

A. stopped

B. had stopped 

C. would stop