Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______ of the quality of their products.
| A．expense | B．exposure |
| C．expansion | D．expectation |
-Waiter?
-______?Just a minute please.
| A．What. | B．Hello | C．OK | D．Yes. |
One more week,______we will leave school and have a holiday.
| A．so | B．but | C．and | D．or |
He is no fool at all;_________，he is the smartest boy I have ever seen.
| A．in addition | B．in fact | C．in particular | D．in short |
-How about his design?
-Well, to tell the truth, it is______but satisfactory.
| A．something | B．anything | C．everything | D．nothing |
-What's up? You look worried.
Well,I_____on the problem for 5 hours but I haven't got a single clue.
| A．have worked | B．worked |
| C．will work | D．have been working |