英语试题,高手帮忙,好的追加50分

英语试题,高手帮忙,好的追加50分
When people talk about the places of interest in China,the first _____ coes into mind is the Summer Palace.
A place B of them C one D.that
By serving oehers ,a person focuses on someone other than himself or herself,_____ can be very eye-opening and rewarding.
A who B.which C what D that
-You saved my life_________to your own.
-Don't mention it.We are close friends,so I will take the________for friendship's sake
A.at risk;risk B at danger;danger C at risk;danger D at danger;risk
要详细解释,谢谢
-It was really very kind of you to give me a lift home.
-Oh,don't mention it.I _____ past your house anyway.
A.was coming B will come C had come D have come
In such dry weather,the flowers will have to be watered if they _____.
A have survived B.are to survive C would survive D will survive
Many countries face some serious problems of land use,_____ result from population growth and the demands of modern life.
A.most of which B most which C which most D most of them
Those were the assistants _____ to do the research work in the lab.
A to whom it was their responsibility
B whose responsibility there was
C.whose responsibility it was
D of whom responsibility was
注:本题要把各选项改正