---So you've left the classroom key inside again?---No.I've got it with me this time,but I have forgotten ______ the door?
If you want somebody to go window shopping with you, why not try calling Marie? —she ________ be home by now.
—How was your trip to Yancheng last week? —Wonderful! I only felt sorry that I ________ the nature reserve of redcrowned cranes, but the weather was awful.
If I ________ your advice then, I think that the crops could be growing better.
If you ________ home without a word, your parents wouldn't be so worried now.
We ________ here on time but we were caught in a traffic jam.