Can you imagine _______________ on the earth in the future?
一Frank,you look worried.Anything wrong? 一Well,I______a test and I”m waiting for the result.
He did not write _________,though(尽管)he had______ 。
We are going to Beijing. Can you _______________when the train will leave ?
He is__________ outgoing student from _________ university in America.
— Could you tell me ____ ? — Certainly. In half an hour.