单项选择题— Sorry, do you mind if I smoke here —Yes,().
A. you could B. go ahead C. I do D. my pleasure
单项选择题It's the first time that he has been to Australia, ()
A. isn't he B. hasn't he C. isn't it D. hasn't it
单项选择题Peter's jacket looked just the same as Jack's, but it cost ()his.
A. as much twice as B. twice as much as C. much as twice as D. as twice much as
单项选择题Children need friends ()their own age to play with.
A. of B. for C. in D. at
单项选择题My parents have promised to come to see me before I ()for Africa.
A. have lef tB. leave C. left D. will leave