Câu hỏi: Some people are using motorbikes for transportation; ....................., others are taking publicvehicles to get to their destination.

A. hence

B. otherwise

C. therefore

D. besides

Câu 1: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 2: The Smiths are eating less and exercising more; ..............., they can keep their weight down and stay in shape.

A. Consequently

B. also

C. nevertheless

D. otherwise

Câu 3: Louise was listening to the radio while she .................. the house.

A. is cleaning

B. was cleaning

C. had cleaned

D. will dean

Câu 4: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 5: 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 6: I ............... on the bus when I dropped my wallet.

A. am getting

B. get

C. have gotten

D. was getting