Where were you at supper time?  I ____ for you to join me. 
#102899
A
waited
B
had waited
C
have been waiting
D
was waiting
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He looked as though he _________ a ghost(鬼).
#103810
A
saw
B
has seen
C
have seen
D
had seen
The elderly _________ good care of in public places like supermarkets and airports; they are likely to get lost.
#102324
A
can have been taken
B
ought to be taking
C
must be taken
D
should take