Câu hỏi: These are very .................... chairs.

A. comfort

B. comfortably

C. comfortable

D. comforts

Câu 1: The plant…………………………the window needs water.

A. by the time

B. by

C. is by

D. is

Câu 2: Your garden is ................. beautiful.

A. perfectly

B. perfect

C. perfected

D. perfection

Câu 3: Steve ate his dinner .................. 

A. quick

B. quickly

C. quicken

D. quickened

Câu 4: The people………………….this office are very helpful.

A. In

B. work

C. are working

D. work in

Câu 5: The people…………………next door aren't very friendly.

A. are living

B. live

C. is living

D. living

Câu 6: Biology is…………………..of all my classes this semester.

A. the hardest

B. harder

C. hardly

D. harder than