二．開首句型
1） Have you ever gone***? Have you ever been to***? If you have no experience like these, your life is an inadequate one.
2） Are you***? Are you***? We are, usually.
3） In large part as a consequence of***, somebody have focused a great deal of attention in recent years on something.
4） We expect the day will come when A with its characteristic of***
5） Being adj. is one of the virtues that people must possess （not only in***but also in***/during***/when***）
6） What A to B, that C to D
7） Currently, there is a widespread/serious concern over that***
8） The reasons for the***are manifold, for instance, ***
9） Several factors contribute to this***, such as***, as for as I'm concerned, however, ***is the most significant ingredient/element.
10） ***is more violent than what we thought it should be before.
11） There are intimate relations between the two.