1. He asked me if I _____ to swim across the river. a) Be able b) Could c) Was able d) Am able 2. If he ___worked harder,

1. He asked me if I was able to swim across the river. 2. If he had worked harder, he would have passed the exam. 3. I was given a letter by an unknown person yesterday. 4. One thousand people are employed by the company. 5. If I knew the answer, I’d tell you. 6. What’ll happen when the train stops? 7. Had you he already seen the doctor by that time? 8. She had passed her exam by two o’clock. 9. Last year I was ill only twice. 10. It has been snowing for three hours.