英语题 麻烦了

1.选A，解释为“既然”，既然大家都到了，（那么）就立刻出发吧！
2.选B.此句为定语从句，理解为“the prpgress in science of medicine”
3.选B.解释为“就……而言”，就我所知道的而言，他们要去观看北京2008奥运会
4.选C.，一切都取决于他们是否将帮助你。A与C虽然都有“是否”的意思，但是当A与C同时解释为“是否”的意思时，一定选C

1.___After___everybody is here,let's set out right away.
A Now that B Because C For D After
2.The science of medicin,___with which___progress has been very rapid latly,is perhaps the most inportant of all the sciences.
A to which B in whith C which D with which
3.___so far as ___I know,they will go to Beijing to watch the Olympic Games in 2008.
A Since B So far as C In case D As if
4. Everything depends on___whether___they will support you about it.
A if B which C whether D that

1.______everybody is here,let's set out right away.
A Now that 既然
2.个人认为应该是whose
3B据我所知
4C是否,引导宾语从句,不做成分

1.A 既然每个人都到了,我们出发吧.
2.B 近来快速发展的医学也许是在所有科学中最重要的.
3.B 只要我知道了,他们就会去看奥运会.
4.C 一切都要看他们是否帮助我们.
以上