They walk to the post office in 15 minutes.

A. It takes them 15 minutes to walk to the post office.

B. It takes them 15 minutes walk to the pots office.  

C. It takes 15 minutes them to walk to the post office.

D. It takes them the post office to walk in 15 minutes.

Mr. Tuan drinks more beer than Mr. Ba

A.Mr. Ba drinks more beer than Mr. Tuan

B.Mr. Ba drinks fewer beer than Tuan

C.Mr. Ba drinks less beer than Mr. Tuan

D.Mr. Ba drinks much beer than Mr. Tuan