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: I don't want to go outside today because it ....................

A. rain

B. rains

C. is raining

D. is rain

Câu 2: 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 3: By the time this movie is over, we ................... this entire bag of popcorn.

A. will have eaten

B. are eating

C. are going to be eating

D. will be eaten

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: Babies ................ when they are hungry.

A. cry

B. are crying

C. have been crying

D. cries

Câu 6: Barbara .................. that package to you tomorrow morning.

A. deliver

B. is going to deliver

C. are going to deliver

D. delivering