Before I made any attempt, I used a stick to test the depth of the river, and _________ at the great depth of it, not daring to take further action.
----The last one _____ pays the meal. ----Agreed!
_________school work, I spend most of my spare time singing and dancing.
My brother has been preparing carefully for the English exam, so that he can be sure of passing it at his first _______
I’m sorry you’ve been waiting so long, but it’ll still be some time ______ Smith gets back.
----How long will you stay in Peking University? ---- I don’t know. ________.