Steven has a lot of work to _______ in the office since he has been away for quite a few days.
#63822
A
take up
B
make up
C
work out
D
carry out
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They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.
#63797
A
had been working; are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working
 The plan ______ just because people were unwilling to co-operate.
#63826
A
broke down
B
pulled down
C
turned down
D
put down
The two friends _____ on the Internet for three hours, and they would go on till the next morning. 
#63829
A
had been chatting
B
had chatted
C
were chatting
D
has been chatting