4.about 10 to 15 minutes（） outside in full sun will give a person enough sunshine vitamin

A. Spending, B. Spent C. to be spent. D. to spend

解释：句子主语主干minutes,而谓语是后面的will give,所以选项引导后置定语,修饰主语minutes.
很明显,minutes和spend之间为被动关系,排除A；
CD使用了不定式,但都强调spend 10 to 15 minutes为尚未发生的动作,不符句意,排除.

8 () from her colleagues' teaching experience the young teacher can give her lessons more convincing now.

A. Benefited, B.Being benefited C. Having benefited, D. Having been benefited

感觉应该是D。

9. The immigrants had to pass a medical inspection () to exclude the sich and the mentally ill

A. Intended, B. intending, C. to intend. D. Being intended

解释：分析句子结构,可知选项所引导的成分做后置定语,修饰inspection.
根据固定短语be intended to do sth,可知inspection和intend之间为被动关系,所以用其过去分词形式,即答案A正确.
B表主动,C表未发生,D表正在进行,均排除.

10 the global warming we've seen so far had started almost everything frozen on Earth()

A, Melt, B. to be melted, C to have melted, A melting

melting(冰冻的东西被融化，是中国人的概念，在西方冰冻的东西是自己融化的)

18 besides the Internet, television is another major way of communication () us to see the performers as well as to hear the voice

A. permitting, B, To permit, C. Being permitted D. permitted.

the plane is reported (crash) shortly after it took off(不定式和现在分词做定语)

the boy pretended (sleeping) when his mother came in

25. Tracy Mcgrady announced his operation decision to the press without informing his club, leaving his team members ()why he did so.

A to wonder, B, wondered, C. wondering, D. wonder (答案为 A错，应该是C）

26 (Regarded) as the main reason for the recent worldwide economic problems is the fact that the U. S. governemnt would hardly accept.

这是一个倒装句
也就是 = the fact that the US government would hardly accept is regarded as the main reason for the recent worldwide economic problems
注意 that引导的是定语从句 不是同位语从句
句子主干是the fact is regarded as the main reason

30. please remain seated until the plane has come to complete stop

39 Bill suggested (hold) a meeting on what to do for the Shanghai Expo during the vacation

• A、having held   B、to hold   C、holding  D、hold （答案为C）

• 43 the newly concluded National People's congress has passed a package of economic polocies(target) 8%of yearly economic growth.

新近结束的全国人民代表大会已经通过了一系列的经济政策,目标是年经济增长8%.
target这个动词与hope类似,可以用hoping (to get) sth. 表示目的,做某事可以目的是to get sth., 但不能用to hope (to get) sth.来表示目的, has passed 本身表示的是结果,不是过去做了一件事（有目的的）,不说In order to target sth. sb. passed sth. 更不可以说：In order to target sth., sb. has passed sth. 所以排除表示目的不定式短语B.to target.
至于D,更是错误,因为target是及物动词,用过去式表示被动,后面应该有个介词by或at,或with后才可以跟一个名词.

还有一个解释如下:

评：target作为及物动词，表示“以。。。为目标”，其宾语多为具体的人或事，少见有这样的例子。疑为人工造句。
不论是The Congress还是the polices发出target 这个动作，其宾语也是 a yearly economic growth of 8%.
是主动的。
被动的例子如上television advertising targeted at children
=television advertising which is targeted at children
targeted 后要加个at之后者跟名词（是以...为目标的）
如果这些个policies是以。。。为目标的，应为targetd at....才对。

怎么矛盾啊？