John didn’t choose of the ties and went away without looking at a third one.
| A．many | B．either | C．all | D．any |
Jane’s pale face suggested that she ill, and her parents suggested that she medical examination.
| A．be; should have | B．was; have |
| C．should be; have | D．was; has |
—Waiter!
—
—I can’t eat this. It’s too salty.
| A．Yes, sir? | B．What? |
| C．All right? | D．Pardon? |
Children’s brains can’t develop properly_______ they lack protein(蛋白质).
| A．when | B．since | C．because | D．unless |
This is the very toy car ________ which he came here the other day.
| A．by | B．in | C．for | D．on |
Spacecraft “Discovery” has failed in the course of launch.
----_______? They have been preparing for the test.
| A．How come | B．When | C．How | D．Why not |