The speed of cars is usually limited __________30 miles per hour on the busy city street.
| A．by |
| B．at |
| C．to |
| D．for |
Recently our government policymakers are very ______ about the rapidly rising food cost.
| A．satisfied | B．concerned | C．angry | D．confused |
Many people agree that______ knowledge of English is a must in______ international trade today.
| A．a; 不填 | B．the; an | C．the; the | D．不填；the |
－－The button in the kitchen is out of order.
－－_______.
| A．I’m really sorry to hear that. |
| B．No problem. It’ll be OK. |
| C．Anything else I can do? |
| D．Why not get Mr. Kidder to have a look |
– I’m sorry I can’t go to your party tonight.
-- ____________? Haven’t we agreed on it?
| A．What is it | B．Why don’t you | C．What do you think | D．How is it |
-- What’s wrong with your pen?
-- The ink ___________ come out.
| A．can’t | B．won’t | C．hasn’t | D．doesn’t |