When the old man ______ to walk back to his house, the sun       itself behind the mountain. 
#101758
A
started; had already hidden
B
had started ;had already hidden
C
had started; was hiding
D
was starting; hid
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---Has Tom finished his composition yet?  ---I have no idea, he _____ it this morning.
#103677
A
would write   
B
has written   
C
wrote
D
was writing
They will be back home      
#104893
A
a week later
B
after a week
C
in a week
D
a week
We________on this project for four hours.Let's have a rest.
#99184
A
are working
B
have been working
C
worked
D
had worked