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

A. was discovered

B. has been discovered

C. was discover

D. they discovered

Câu 1: When my father was young, he _____ work in the garden for long hours.

A. can

B. could

C. will

D. should

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

A. does

B. dos

C. do

D. is doing

Câu 3: He came up with the solution __________ every problem.

A. in

B. at

C. for

D. to

Câu 4: ___________ does Minh do after school? He plays soccer with his friends.

A. When

B. Which

C. What

D. Why

Câu 5: Tom is watching TV now. So ____________.

A. does Mary

B. Mary

C. is Mary

D. Mary does

Câu 6: In the USA students ________ school uniform.

A. wore

B. wearing

C. don't wear

D. not wear