1.—Excuse me,but I want to use your computer to type a repor

1、这是某年的高考题.选A；难点在D
D正确的搭配是. shouldn't ... if you can't/don't know how to take care of it. 原题是表允许,而不是假设.Ifyou don't know how to take care of a computer, you shouldn't be allowed to use one (because you might damage it.)（对）
原题实际等于："May I use your computer",丝毫没有假设的意思
You may / can not have my computer if you won't take care of it.（自然多了）
2、选B.I CAN'T表示客观条件不允许,表示“我不能”——没有能力,无法办到

1. A
shall是用于表示未来要做的事
should是表示推测和可能性。在这句话中，你不要用我的电脑，如果你不会爱惜它。并不是推测和可能是毋庸置疑的！
2.B
I can't 我不能，意思与一楼的一样。