—Bob has gone to California.—Oh, can you tell me when he ______?
We should consider what use can _____ such a piece of cloth.
I really don’t know _____ I put my wallet after I paid the bill.
People working 10 or 11 hours a day are more likely to suffer from health problems than _____who go off duty after eight hours.
I should convey my appreciation to my high school teachers, without ____ help I wouldn’t achieve such a big success.
— Mum, would you please buy me an MP5 player?— If you can help do some housework the whole vacation,you ____ have one as a reward.