Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
| A．while | B．or | C．for | D．so |
Look! One of the girls ______the door.
| A．cleans | B．is cleaning | C．clean | D．are cleaning |
If you don’t feel well, you may just ______.
| A．stopped reading | B．stop reading | C．stopped to read | D．stop to read |
----Where can we get a baseball?
----Let’s ______.
| A．lend Jim one | B．lend one to Jim |
| C．borrow one from Jim | D．borrow one of Jim |
----My model ship doesn’t work.
----Don’t worry. I’ll have it ______this afternoon.
| A．repairing | B．made | C．repaired | D．mend |
You ______wash your hands before meals.
| A．need | B．must | C．can | D．may |