He _____ when the UFO arrived.
A. was sleeping B. were sleeping C. has slept
— Kate wants to know if you _________ a picnic next Sunday.
— Yes. But if it _________, we’ll visit the museum instead.
| A．will have; will rain | B．have; rains |
| C．have; will rain | D．will have; rains |
Why not _________ by boat for change?
| A．to try to go | B．trying to go |
| C．to try and go | D．try to go |
— Jenny, _________ do you visit your grandparents?
— Twice a month.
| A．How long | B．How soon |
| C．How often | D．How many |
Albert! It’s time for you to go to bed, _________ you will feel tired tomorrow.
| A．or | B．but | C．so | D．and |
While my brother _______ football with his friends yesterday, my sister _______ her homework.
| A．was playing; did | B．played; was doing |
| C．was playing; was doing | D．played; did |