Câu hỏi: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 1: We .............. to the baseball game when it started to rain.

A. are driving

B. drives

C. driven

D. were driving

Câu 2: Rita .................. class every day.

A. not to attend

B. doesn’t attend

C. not attending

D. isn’t attended

Câu 3: The telephone .............. ten times before Patsy finally answered it.

A. rings

B. ringing

C. had rung

D. is ringing

Câu 4: By next month, I ...................... at this company for a year.

A. will work

B. will be working

C. will have been working

D. am going to work

Câu 5: Kevin can’t talk on the phone because he .............. dinner right now.

A. is eating

B. eats

C. has eaten

D. has been eating

Câu 6: The Wagners ................ to Florida two years ago.

A. moved

B. had been moving

C. move

D. will move