難度：★ 考點(diǎn)：動(dòng)詞時(shí)態(tài)
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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