The  book has been  translated into thirty languages since it        on the market in 1973.
#102971
A
had come
B
has come
C
came
D
comes
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His sister left home in 1998, and_______ ever since.
#102075
A
had not been heard of
B
has not been heard of
C
had not heard of
D
has not heard of
—Bob has gone to California.—Oh, can you tell me when he        ?
#101937
A
has left
B
left
C
is leaving
D
would leave
---Hurry, John!---Oh, damn! Both my legs are nearly to give out. I ____for hours.
#101892
A
had walked
B
walked
C
have been walking
D
am walking