一、单项选择（本题共15小题；每小题1分，共15分。）
( )1. _____ may not seem very _____.
A. Watch TV; useful B. Watch TV; usefully
C. Watching TV; usefully D. Watching TV; useful
( )2. Jim sat _____ to his mother with his eyes half _____ .
A. closed; opened B. close; open
C. closely; opening D. closely; opened
( )3. We mu st be strict _____ ourselves and strict _____ our work.
A. in; with B. with; in C. in; in D. with; with
( )4. Bob doesn’t know _____ to write about.
A. how B. that C. what D. where
