1. unemployment and crime are high, it can be assumed that the latter is due to the former.

　　A. Before

　　B. Where

　　C. Unless

　　D. Until

　　2. Distinguished guests and friends, welcome to our school, the ceremony of the 50th Anniversary this morning are our alumni（校友）from home and abroad.

　　A. Attend

　　B. To attend

　　C. Attending

　　D. Having attended

　　3. --- What’s the matter with Della?

　　--- Well, her parents wouldn’t allow her to go to the party, but she still

　　A. hopes to

　　B. hopes so

　　C. hopes not

　　D. hopes for

　　4. Many young people in the West are expected to leave could be life’s most important decision -- marriage -- almost entirely up to luck.

　　A. as

　　B. that

　　C. which

　　D. what

　　5. Nine in ten parents said there were significant differences in their approach to educating their children compared with of their parents.

　　A. those

　　B. one

　　C. both

　　D. that

　　答案解析：

　　1、【答案】B

　　【解析】哪儿的失业率高 ,哪儿的犯罪就率高,那可以认为是前者导致后者的原因。

　　2、【答案】C

　　【解析】主句 .Distinguished guests and friends are our alumni （校友） from home and abroad. Attending the ceremony of the 50th Anniversary this morning非谓语动词作伴随状语。

　　3、【答案】A

　　【解析】考察固定搭配，hope to do sth;

　　4、【答案】D

　　【解析】句中此处是一个名词性定语从句，leave 是动词，后面要加宾语。其中that 和which 引导宾语从句的话，要有先行词在连接词的前面。所以应该选D

　　5、【答案】D

　　【解析】代词 指代are expected