难度：★    考点：动词时态

　　1. Look at that sign. Smoking ________here.

　　A. isn' t allowed                B. doesn ' t  allow

　　C. aren ' t allowed              D. don't  allow

　　2. Lucy ______ a student last year, but now she ______ a teacher.

　　A. is; is       B. was； is    C. was； will be    D. is； was

　　3. -Were you at home at 9:00 last night? I called you but nobody answered.

　　-Sorry，I ______ at that time.

　　A. take a shower                B. took a shower

　　C. was taking a shower    D. am taking a shower

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