Challenging Yourself 单句语法填空1The fire was so big that it was several hours before firefighters could get it control.答案：under2The father as well as his three children (go) skating on the frozen river every Sunday afternoon in winter.答案：goes3The ordinary girl sat silently at the corner，but when the prince came over to invite her to dance，her face immediately lit 答案：up4Shes lost contact her son，and she doesnt know where he is.答案：with5Frank put the medicine in the top drawer to make sure it would not be (access)to the kids.答案：accessible6The price can affect production，and production in turn，can have an effect the price.答案：on7He is always showing and trying to impress his classmates.答案：off8He was firmly convinced of the (possible) of life on other planets.答案：possibility9We need some more facts and figures we make the final decision.答案：before10I am always dreaming of visiting China，and now my dream has come 答案：true 单句改错1I think it is a top priority for us to furnish the children with access the Internet.access后加to2The new law has come into effect，and the number of wild animals here is on increase now.on后加the3His disappearance is looked into by the police，who are making every effort.looked前加being4Seriously having damaged，the bridge is no longer in use.去掉having5Excuse me.Hasnt the train from Beijing arrived yet?Actual, you are three quarters earlier.Its only 9：00 now.ActualActually 完成句子1 (尽管他是个孩子)，he can answer the difficult questions.答案：Child as he is2It was a pity that the policeman failed to find such a person (正如所描述的)by the witness.答案：as had been described2