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, he would have passed the exam.
a) Had
b) Would have
c) Had have
d) Would
3. I ____ a letter by an unknown person yesterday.
a) gave
b) have been given
c) was given
d) have given
4. One thousand people _____by the company.
a) employ
b) are employed
c) employed
d) are employing
5. If I ______the answer, I’d tell you.
a) know
b) would know
c) knew
d) had known
6. What’ll happen when the train _____?
a) stop
b) will stop
c) stops
d) stopped
7. _____he already _____the doctor by that time.
a) Has seen
b) Did see
c) Was seeing
d) Had seen
8. She _____her exam by two o’clock.
a) passed
b) have passed
c) has passed
d) had passed

9. Last year I ____ ill only twice.
a) Was
b) have been
c) am
d) has been
10. It _____ for three hours.
a) Was snowing
b) Snowed
c) Is snowing
d) Has been snowing