单项选择题
A. Computer trained secretary. B. Trainerin kindergarten. C. Teaching assistant. D. Shop assistant.
I've been taking English lessons for 3 months but I ()h...
单项选择题I've been taking English lessons for 3 months but I ()haven't made much progress.
A. always B. yet C. still D. already
Don't() your books on the floor.A. lieB. layC. laidD. l...
单项选择题Don't() your books on the floor.
A. lie B. lay C. laid D. lain
All that can be done ()A. have been doneB. have doneC. ...
单项选择题All that can be done ()
A. have been done B. have done C. has been done D. has done
