We’d be very grateful if you could join us because your cooperation will _____ the timely completion of our project.

—Do you think that housing price will keep_______in the years to come?—Sorry,I have no idea.

To make the students understand the problem the teacher tried to explain it, but the explanation just did not _________to the class．

Although the wind has       , the rain remains steady, so you still need a raincoat.

A lot of questions _________ at the meeting, which made things more complicated(复杂的).