1. We ________ the mountains yesterday, but today we can't. (can/to see)

2. Maybe the Smiths ________
a new house next year. (can/to build)

3. If you try hard, you ________
your examinations. (can/to pass)

4. When I was five, I ________
(not/can/to swim)

5. Dennis ________ the trumpet after four months. (can/to play)

6. Luke has passed his driving test, now he ________ a car. (can/to drive)

7. I ________ to him on the phone for three weeks last month. (not/can/to speak)​