Câu hỏi: The rivers can be…………..by chemicals. 

A. poisonous 

B. contaminated

C. flooded

D. polluting

Câu 1: The police questioned all guests. They……………….that one of them was a spy.

A. wondered 

B. surprised 

C. challenged

D. suspected

Câu 2: I want to take my dogs with me. I need their……. 

A. relation

B. relationship

C. company

D. companion

Câu 3: Because of the increasing enrolment, the school has to employ teachers who are not…….for their jobs. 

A. qualifying

B. qualified 

C. worth 

D. skilled

Câu 4: Argh! This noise is giving me a ________.

A. Headouch

B. Headache

C. Headpain

D. Headhurt

Câu 5: He can make change in his timetable when he wants to. It means that he's got a……….timetable. 

A. modern 

B. fashionable

C. flexible

D. convenient

Câu 6: I need some small change to……..the porter. 

A. dip

B. chip

C. sip

D. tip