1. i haven't heard from him _____ he went to
2.he won't be here _____ he is invited .
3. he will not go to the cinema _____ he is very busy .
4. we found the key _____ she lad left it .
5. we found the books two days ____ he had gone away .
6. we had no sooner got to the station _____ the train left .
7. he speaks english ______ he were an englishman .
8.he is explaining clearly _______ they could understand .
9. do not leave the room _____ you have finished the test .
10. she sang ______ she went along .
答案： 1.since 2.unless 3.because 4.where 5.after 6.than 7.as if 8.so that 9.before资源难易程度:★★★★★★★★★★★★★★★
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