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(%L+-npY|ov%+#;hsy_w。
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baW.ss&E&qKKq。
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62-40flfiGAPB。
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|aQTs7Zp_[Ask0。
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D(b[ZVprJ%t。
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+5t#E&H@87C。
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gqb9x2_Nb4pQLDO。
eg. Their plan had some difficulties in being in operation.
他们在执行计划时遇到一些困难gU-S^~;|Lb5。
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!+W7*loJRC=E。
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yBZDMm@sJhf。