1. He asked me if I _____ to swim across the river.a) Be ableb) Couldc) Was abled) Am able2. If he ___worked harder, he would have passed the exam.a) Hadb) Would havec) Had haved) Would3. I ____ a letter by an unknown person yesterday.a) gaveb) have been givenc) was givend) have given4. One thousand people _____by the company.a) employb) are employedc) employedd) are employing5. If I ______the answer, I’d tell you.a) knowb) would knowc) knewd) had known6. What’ll happen when the train _____?a) stopb) will stopc) stopsd) stopped7. _____he already _____the doctor by that time.a) Has seenb) Did seec) Was seeingd) Had seen8. She _____her exam by two o’clock.a) passedb) have passedc) has passedd) had passed9. Last year I ____ ill only twice.a) Wasb) have beenc) amd) has been10. It _____ for three hours.a) Was snowingb) Snowedc) Is snowingd) Has been snowing