— I called you at 4:00 yesterday afternoon, but no one answered.—Sorry, I _____ with my friends at that time.
A. swim
B. swam
C. will swim
D. was swimming
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Excuse me, where is Mr. Brown's office?—Sorry, I don't know. I_____ here for only a few days.
A. work
B. worked
C. will work
D. have worked
I met a good friend of mine while I______ on the street.
A. walks
B. walk
C. was walking
D. am walking
— Please turn off the TV . The baby ______.—OK. I ’ ll go out for a walk.
A. was sleeping
B. sleeps
C. slept
D. is sleeping
Have you ever been to Shanghai?---Yes. I ________ there a few months ago.
A have been
B. went
C. have gone