"The final exam is coming. You'd better concentrate ___________ your study. " Mother informed me __________ it.
| A．to; of | B．on; off |
| C．in; on | D．on; of |
16. You cannot be too careful. Which of the following sentences doesn’t have the same meaning of the underlined sentence? _____
| A．You cannot be careful at all. |
| B．You cannot be over careful. |
| C．You cannot be careful enough. |
| D．You cannot take enough care. |
15. In an emergency, you should remain _____.
| A．calm | B．silent | C．quiet | D．Tranquil |
14. It was a _____ evening and I really had a good sleep.
| A．calm | B．silent | C．quiet | D．safe and sound |
13. The foreman(工头) beat him _____ , and the other workers were very angry with him.
| A．red-blooded | B．black and white | C．red-handed | D．black and blue |
12. Although he was not _____ tired, he didn’t care _____.
| A．a little; a little | B．a bit; a bit | C．a little; a bit | D．a bit; a little |