Câu hỏi: Television is a prime source of home entertainment; ................, it is a cheap babysitter.

A. furthermore

B. therefore

C. accordingly

D. on the contrary

Câu 1: 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 2: The old drainage pipelines must be maintained; ................, leakage will be unavoidable.

A. therefore

B. similarly 

C. on the contrary

D. otherwise

Câu 3: I .............. Michael for years.

A. have known

B. know

C. knowing

D. was known

Câu 4: The store ..................... two sales so far this year.

A. is having

B. has been having

C. has

D. has had

Câu 5: Annette spent a year long to search for scholarship; ................, she did not get positive result.

A. therefore

B. moreover

C. still

D. asa result

Câu 6: We always...................... a present to Elsa on her birthday.

A. are taking

B. taking

C. take

D. are taken