1. Because the street was crowded with people, I couldn’t drive fast. A. If the street weren’t crowded with people, I could drive fast. B. If the street hadn’t been crowded with people, I could have driven fast. C. If the street were crowded with people, I couldn’t drive fast. D. If the street had been crowded with people, I couldn’t have driven fast. 2. The test is difficult so Mary can’t do it. A. If the test isn’t difficult, Mary can do it B. Mary could do it because the test is difficult C. If the test were difficult, Mary couldn’t do it. D. Mary could do the test if it weren’t difficult. 3. She helped us a lot with our project. We couldn’t continue without her. A. Provided her contribution wouldn’t come, we couldn’t have continued with the project. B. Unless we had her contribution, we couldn’t have continued with the project. C. If she hadn’t contributed positively, we couldn’t have continued with the project. D. But for her contribution, we could have continued with the project. 4. Your assistance is very useful. That enabled us to get achievement. A. Without your assistance, we could not have got achievement. B. Your assistance discouraged us from get achievement. C. If you assisted us, we could not get achievement. D. Without your assistance, we could get achievement. 5. Provided your handwriting is legible, the examiner will accept your answer. A. Although the examiner cannot read your handwriting, he will accept your answer, B. Whatever your handwriting, the examiner will accept your answer. C. The examiner will accept your answer if your handwriting is beautiful D. So long as the examiner can read your handwriting, he will accept your answer. 6. I will only work extra hours if I get paid at a higher rate. A. I will not work extra hours even if I get paid at a higher rate. B. Working extra hours means I won’t get paid at a higher rate. C. Unless I get paid at a higher rate, I won’t work extra hours. D. I get paid at a higher rate because I will work extra hours. 7. Because the weather was bad, we didn’t go camping. A. If the weather wasn’t bad, we would go camping. B. If the weather weren’t bad, we would go camping. C. If the weather is good, we will go camping. D. If the weather hadn’t been bad, we would have gone camping. 8. But for Helen acting so wonderfully, the play would be a flop. A. Helen acted so wonderfully, but the play was a flop. B. If it wasn’t for Helen’s wonderful acting, the play would be a flop. C. The play was a flop although Helen acted so wonderfully. D. The play was a flop although Helen was such a wonderful actor