一、单项选择。（20分）
（ ）1. She ______________ the Grand Canyon twice.
A. has bee n to B. has gone to C. went to D. goes to
（ ）2. Don’t make any noise, Grandma .
A. sleeps B. slept C. is sleeping D. sleeped
（ ）3. There a meeting next Monday.
A. is B. will C. will be D. are
（ ）4. China is ______ ancient cou ntry with a long history.
A. a B. an C. 不填 D. the
