Câu hỏi: Gold _______in California in the 19th century.

A. was discovered

B. has been discovered

C. was discover

D. they discovered

Câu 1: It’s necessary __________ your listening and writing skills.

A. to improve

B. improve

C. improving

D. improved

Câu 2: Ba always ____________ the homework before going to class.

A. does

B. dos

C. do

D. is doing

Câu 3: I usually watch TV ________ the evening.

A. on

B. at

C. in

D. All are correct

Câu 4: – Do you have to buy this hat? – No, I _____. It isn't necessary.

A. mustn't

B. won't

C. needn't

D. don't need

Câu 5: My mother told me __________ hard.

A. study

B. studying

C. to study

D. studied

Câu 6: When we were on holiday, we used ________ to the beach every day.

A. go

B. to go

C. going

D. gone