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D. were, would have prevented 13. ____hard, he would have passed the exam A. If he were to work B. Had he worked C. Should he work D. Were he to work 14. ____today, he would get there by Friday A. Were he to leave B. If he had left C. Did he to leave D. Had he left 15. Had you listened to the doctor, you ____all right now A. are B. were C. would be D. would have been 16. I did not see your sister at the meeting. If she ____, she would have met my brother A. has e B. did e C. e D. had e 17. He ____busy yesterday, or he ___ you with your experiment. A. was, had helped B. was, would have helped C. had been, would have helped D. were, would have helped 18. I was ill that day, otherwise I ____ the sports meet A. would have taken part in B. took part in C. had taken part in D. would take part in 。 wouldn’t get C. were driving。 注 : if only引導(dǎo)的感嘆句和 as if / as though 引導(dǎo)的狀語從句也有相同用法 IV.當堂檢測 1. If only he ____ quietly as the doctor instructed, he would not suffer so much now.