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: My parents    ........... in Florida since 1999.

A. has lived

B. have lived

C. are living

D. live

Câu 2: 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 3: We .............. to the baseball game when it started to rain.

A. are driving

B. drives

C. driven

D. were driving

Câu 4: The Wagners ................ to Florida two years ago.

A. moved

B. had been moving

C. move

D. will move

Câu 5: Babies ................ when they are hungry.

A. cry

B. are crying

C. have been crying

D. cries

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

A. are taking

B. taking

C. take

D. are taken