Tom has been absent for two days.Do you know what _________ to him?
#103347
A
has happened
B
would happen
C
was happened
D
had happened
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His sister left home in 2009, and__since.
#101520
A
had not been heard of
B
has not been heard of
C
had not heard of
D
has not heard of
 She       volleyball regularly for many years when she was young. 
#99866
A
was playing
B
played
C
has played
D
had played
We are all _______about her safety . As far as I am _____, this case _____her . 
#103237
A
concerns ,concerned , concerns
B
concerned , concerned , concerns
C
concerns , concerns, concerned
D
concerning ,concerned ,concerns