[ Tenses ]
They _____ (work) on this project since January.
A. will be working
B. are working
C. have been working
D. work
Select your answer:
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Vocabulary › Viewa person walking along a road or in a developed area.
A. pedestrian
B. psychological
C. mobility
D. objective
Grammar › View
It is necessary that we come up with a way to ____________ this difficult problem as soon as possible.
A. solving
B. solve
C. solves
D. solved