重点讲解：
1. play a role in
发挥作用；
eg. She play a notable role in compile the book.
在编写这本书的过程中，她起了显著的作用。
eg. The UN would play a major role in monitoring a ceasefire.
联合国在监督停火方面会发挥重要作用。
2. as to
关于…；
eg. They should make decisions as to whether the student needs more help...
他们应该决定学生是否需要更多的帮助。
eg. Andy sat down at the table and inquired as to what the problem was.
安迪在桌边落座，询问出了什么问题。
3. flock to
蜂拥；群集；
eg. The public have flocked to the show.
公众蜂拥而至观看演出。
eg. The criticisms will not stop people flocking to see the film.
批评的声音不会阻止人们涌到影院观看这部电影。
4. in operation
使用；运作；
eg. Until the rail links are in operation, passengers can only travel through the tunnel by coach.
在铁路连线开通之前，乘客只能乘坐长途客车穿越隧道。
eg. Their plan had some difficulties in being in operation.
他们在执行计划时遇到一些困难。
5. make room for
给……让出地方；
eg. The store is selling off their old television sets to make room for the latest models.
这家商店正廉价出售老式电视机，以便腾出地方进新型号的电视机。
eg. Half the houses in the street are being pulled down to make room for the new post office.
这条街的半数房屋正在拆迁，给新的邮局腾出空地。
