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418£®--- Would you have called her up had it been possible? --- Yes, but I busy doing my homework. A£®was B£®am C£®had been D£®would be A¿¼²é¶¯´Êʱ̬¡£¾äÒ⣺¹ýÈ¥ÎÒÕýÔÚ×ö¹¦¿Î¡£
419. Unexpected difficulties ____in the course of their experiment.
A. arises B. were arising C. arose D. were arisen C¿¼²é¶¯´Êʱ̬¡£¸ù¾Ýin the course of their experiment¿ÉÖªÓÃÒ»°ã¹ýȥʱ¡£
420£®--- Do you think we should accept that offer?
--- Yes, we should, for we such bad luck up till now, and time out. A£®have had; is running B£®had; is running C£®have; has been run D£®have had; has been run
A¿¼²é¶¯´Êʱ̬¡£µÚÒ»¿ÕÓÉup till now¿ÉÖªÓÃÏÖÔÚÍê³Éʱ£»µÚ¶þ¿ÕÓýøÐÐʱ±í½«À´Ê±¡£ 421£®By the time he realizes he into a trap, it¡¯ll be too late for him to do
anything about it. A£®walks B£®walked C£®has walked D£®had walked C¿¼²é¶¯´Êʱ̬¡£¾äÒ⣺ֱµ½ËûÒâʶµ½ËûÒѾ×ß½øÈ¦Ì×ʱ£¬ËûÔÙ×öʲô¶¼ÍíÁË¡£
422£®This is the first time we a film in the cinema together as a family. A£®see B£®had seen C£®saw D£®have seen D¿¼²é¶¯´Êʱ̬¡£´Ë´¦¿¼²éThis is the first time¾äÐÍ£¬ÆäºóÓÃÏÖÔÚÍê³Éʱ¡£ 423£®I along the street looking for a place to park when the accident . A£®went; was occurring B£®went; occurred C£®was going; occurred D£®was going; has occurred
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424£®--- It was really very kind of you to give me a lift home. --- Oh, don¡¯t mention it. I past your house anyway. A£®was coming B£®will come C£®had come D£®have come
A¿¼²é¶¯´Êʱ̬¡£Óï¾³£º---ºÜ¸ÐлÄã°ÑÎÒ´ø»Ø¼Ò¡£---²»ÓÃл¡£²»¹ÜÔõôÎÒҲҪ·¹ýÄã¼Ò¡£´Ë
´¦ÓýøÐÐʱ±í½«À´Ê±¡£ 425.¡ª How about buying Sam a mobile phone? After all, he isn¡¯t a boy any more. ¡ª I think it necessary, for we sometimes want to make sure if he _______ home for dinner.
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D. would come
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