He let a week go by before answering the letter.（英译中)

Perhaps he will refuse.－Well, if he（) , let me know.A.will refuseB.refusesC. is going

He _____ to school by bus, but now he goes to school on foot. A. used to going B.

Speaker A: Lets meet before next weeks meeting, Jane. I want to kick around some ideas wit

The director mentioned to us ______he was going to do this experiment once again by himsel

Such crimes may be so complex that months or years go by before anyone ________ the

We’ll be traveling by ________ camel across the desert before we go to ________university. A./; theB