He______for three years.
A. has joined
B. has been in the army
C. joined
D. has served the army
His grandfather______for thirty years
A. died
B. was dead
C. has been dead
D. has died
I______ from my brother for a long time.
A. not have heard
B. have not heard
C. have heard not
D. do not hear
He______ that factory since 1958.
A. has left
B. has worked in
C. has gone from
D. has come to
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