______ abroad for more than two years, he returned to his hometown.
| A．Studied | B．Studying |
| C．Having studied | D．To study |
17. Be when you cross the road.
| A．careless | B．beware | C．careful | D．Carelessness |
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 |