Ever since Daming graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company. 
#100158
A
worked
B
has been working
C
is working
D
works
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I ___________ to phone her all day, but whenver I phone her, the line is engaged.
#101328
A
tried
B
had been trying
C
have tried
D
have been trying
 This is the best chance for you to go abroad. Don't ________. 
#99665
A
throw it away
B
put it away
C
take it away
D
hide it away
The library needs ________, but it’ll have to wait until Sunday.
#104295
A
cleaning
B
be cleaned
C
clean
D
being cleaned