enlish:grammer

enlish:grammer
enlish:
1.mark was a student at this university from 2000 to 2004,
____ he studied very hard and was made chairman
a during whose timeb during which time
c gor which time d by that time
2.at the point in our game ___when i'd had predictedthe
score to be 9 to 1 in my favor,it was instead 7 to 9
a when b where c whom d which
3. it was a matter of __wouls take the position .
a who b whoever c whom d whomever
4.____you composition carefully ,some spelling mistakes can be avoided
a having checked b checked c if you check d to check
it's a matter of __是什么意思
第2句翻译一下
第一句c是for which time
答案是：BAA C
希望得到每一题得详解