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

He was nearly drowned in a pool.—Oh, when was ______ exactly?— It was in 1983 _______ he was swimming with his friends.

came all the way to inform you of the time and place of the meeting. —You could haveyourself the trouble by calling me.

There’s nobody here our English teacher. Fortunately, she is more than glad to give us help when we are in trouble.

They have something common.Both of them are good dancing.