Câu hỏi: Fish were among the earliest form of life. Fish ………….. on earth for ages and ages.

A. existed

B. are existing

C. have existed

D. exist

Câu 1: Glenda…………..extremely hard when she was a student.

A. worked

B. has worked

C. was working

D. had been worked

Câu 2: According to the research reports, people usually ………….. in their sleep 25 to 30 times each night.

A. turn

B. are turning

C. have turned

D. turned

Câu 3: The sun . . . . . . . . . . . . . . . in the east.

A. rise

B. rose

C. rises

D. rising

Câu 4: He enjoys _____ in the rain.

A. walk

B. walks

C. to walk

D. walking

Câu 5: Homestead High School football team………….. a championship until last season.

A. has never won

B. had never been winning

C. is never winning

D. had never won

Câu 6: Just keep on................ what you like.

A. do

B. did

C. doing

D. done