题目

It is clear that the whole world is passing through a social revolution in which a central ___ must be taken by scientists and technologists. A．process    B．action       C．part   D．measure 答案：C情景选择。1. 别人过生日时，你应对他说：                                 [     ]A. How are you?B. This is for you. C. Happy birthday to you!2. 你想知道别人多大时，你应该问：                               [     ]A. How many?B. How old are you?C. How are you?3. 送给别人东西时，你说：                             [     ]A. This is for you!B. How many gifts?C. Thank you!4. 当别人谢你时，你说：                             [     ]A. Nice to meet you.B. You are welcome.C. Great!