_____ nearly 400 miles before nightfall, all of us felt exhausted(筋疲力尽). [      ]

A. Covering

B. Covered

C. Having covered

D. To be covered

—What color are your clothes?

—My T-shirt _____ white and my shorts _____ blue. [ ]

A. is, is

B. are, are

C. is, are

D. are is