I know little about the accident because not much_________ about it up to now
Once new difficulties _____ in our study, we should learn to use our brains to solve them.
— Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copperfield with you.—____. Who knows when he will be back here next time?
_____ Chinese basketball player Yao Ming will probably return to the NBA if he can recover from _____ earlier injury.
__ Why do you suggest buying a new machine?__ Because the old one has been damaged __________.
Is it the days __________you studied in our school ________have a great effect on your maths?