(   ) 1. _____ may not seem very _____.

A. Watch TV; useful                 B. Watch TV; usefully

C. Watching TV; usefully             D. Watching TV; useful

(   ) 2. We must be strict _____ ourselves and strict _____ our work.

A. in; with      B. with; in          C. in; in          D. with; with

 (   ) 3. Don’t open the window, _____ ?

A. shall we        B. won’t you      C. do you        D. will you