Câu hỏi: Biology is…………………..of all my classes this semester.

A. the hardest

B. harder

C. hardly

D. harder than

Câu 1: The people………………….this office are very helpful.

A. In

B. work

C. are working

D. work in

Câu 2: We always travel by train because it is………………….than a bus.

A. comfortable

B. the comfortable

C. more comfortable

D. the most comfortable

Câu 3: I like that sofa, but this one is………………

A. cheaper

B. cheaper than

C. cheaply

D. cheapen

Câu 4: Kathleen was the only student………………..the test.

A. falls

B. is failing

C. failed

D. to fail

Câu 5: It’s too ............... to work in here.

A. noisify

B. noisy

C. noise

D. noises

Câu 6: You should wear this dress because it’s……………..that one.

A. elegant

B. the most elegant

C. more elegant than

D. the elegant