单选题：They had no sooner arrived at the airport ________ it was ti..

—Why didn’t you tell him the meeting?—He rushed out of the room____I could say a word.[ ]A. beforeB. until C. whenD. after

Tom is reading a book _______ his brother is watching TV. [ ]A. while B. though C. however D. but

短文改错 If someone asks you how you can make you always happy, you will perhaps find rather difficult to give him a proper answer. Do you remember the old saying "No human being can really be happy which is not giving or tryinggive happiness to others?&

Jasmine was holidaying with her family in a wildlife park _____ she was bitten on the leg by a lion. [ ]A. whenB. while C. since D. once

Stand over there _____ you'll be able to see it better. [ ]A. or B. while C. but D. and