Câu hỏi: We know their address, but they don’t know ________.

A. their’s

B. our

C. our’s

D. ours

Câu 1: Those students are working very _____ for their next exams.

A. hardly

B. hard

C. harder

D. hardest

Câu 2: I send ______ a letter every month.

A. her

B. she

C. herself

D. hers

Câu 3: She walked __________ the road without looking.

A. at

B. across

C. through

D. over

Câu 4: Where are _____ children? – They go to school.

A. the

B. you

C. a

D. an

Câu 5: We always go __________ holiday __________ summer.

A. on/in

B. in/at

C. at/on

D. of/of

Câu 6: My friend is ______ so she has a lot of free time.

A. singer

B. single

C. married

D. free