1.from (the flood's)effect
应是flood的所有格所以用whose
2.The place which the bridge is AT
The place 『(at which) the bridge is supposed to be build』 should be __the cross-river triffic is the heaviest.
at which=where 此句主语是the place 后面『』内是修饰成分
你看是where通还是which通
3.I work in a business __almost everyone is waiting for a great chance.
前面有in 哦知道了 用that就不通了 如果用that后面不是修饰business啊 所以用where 意为在“我工作在一个事业,在这个事业中人们都等待机会”（囧 译得好烂!）
4.It is what you do rather than what you say __matters
a that b what c which d that
这是一句强调句（有it is that结构）
把这三个词去掉仍能组成句子
所以是What you do（你所做的） rather than（而不是） what you say （你所说的）matters ×这后面应该还有词吧?×
5.He insisted that what he did __right and the man who had done wrong to him__
a was;was punished b be;be punisded
c was ;be punished d be;was punished
insist是坚持的意思 不过不清楚楼主的意思
好!知道了!
insist+that+sb.(should)+do
所以He insisted that what he did was right and the man who had done wrong to him (should) be punished.
8.Since you have repained my TVset,__is no need for me to buy a new one.
a it b there c this d that
固定用法
there's no need to do
it's no use doing
there's no point in doing
9.__in the regulations that you should not tell other people the password of your e-mail account.
a What is required b What requires
cIt is required d It requires
看不懂该怎么填）
选C 上面跟你说了 是强调句 把it is that这三个词去掉 看懂了吧
10.The country life he was used to __greatly since 1992.
a change b has changed
c changing d have changed
你认为是be used to doing吗?让我们重新审视一下句子
他过去习惯的田园生活从1992年改变了许多
所以The country life （that）he was used to
"he was used to"修饰的是the country life（这才是真正的主语!）