1. science still ........... a cure for cscer A. dosen't find B. hasn't found C. haven't found D. aren't finding 2. while he ............ a route to the Indies, Columbus discovered America 3. einstein, ......... changed our way of seeing the universe, did not learn to read until he was ten A. which theories B. whose theories C. that his theories D. who theories 4. it was a kind of accident for ........... nobody was really to blame A. whom B. that C. which D. who 5. the windows ....... yesterday A. were cleaned B. was cleaned C. cleaned D. had cleaned 6. ............ a city map, we wouldn't have got lost A. if we brought B. had we brought C.if we hadn't brought D. hadn't we brought 7. ........... we had planned everything carefully,a lot of things went wrong A. although B. despite C. because D. because of 8. mr.liming wanted ....... to the meeting 30 mintes early yesterday A. we go B. us going C. us go D. us to go