We should often keep _____ touch with each other, because we are good friends.

Hurry. Mike! The bus is coming. —Wait a moment, please! Let me see if there’s left.

_______her hair getting gray,she decided to have it dyed

His words puzzled me so much that I had a hard time trying to ______ what he really meant.

31.The two ladies are _______ the same age, but there seems to be ten years _______ them