Ⅰ.单项选择（15题15分）
1. As he is doing a dangerous job, his parents ______ his safety.
A. concern themselves with
B. show no concern about
C. are concerned about
D. are concerned with
【解析】选C。句意“因为他从事危险的工作，父母担心他的安全。”根据concern的短语意义，可知C项正确。
⒉—Can I use your computer now?
—Yes, . I＇m not using it now.
A．Come on B．go head C．go on D．never mind
【解析】选B。句意：—我可以用你的电脑吗？—可以，请用吧。我现在不用。A项用于对别的鼓励，加油；C项表示“继续，进展”；D项表示回答别人的道歉。
