你问的都是情态动词的问题.
don't bother me. do what you(will);i don't care.为什么不用would like
这句是表你即将做的事情,是语境决定的.
it has been suggested that people who watch television incessantly(may become)over passive.为什么不用should become
这句是用may表不肯定的猜测,should 表“应该”的意思
they (may have arrived )home by now.let's telephone them again.为什么不用must arrive
还是一样,may是猜测,must 是肯定的猜测
david is waiting alone in the waiting-room.you(ought to have told)him yesterday about the change. 为什么不用ought to tell
"ought to have done..." 本应该做...
(can)anybody else give correct answers to these questions?为什么不用must
表疑问,不确定,must是表肯定的
he told me i (might)go and see him at any time.为什么不用should
might 比may 更委婉,表建议, should表建议,但比较命令化.
建议找本语法书,华师大出版的不错,看看这些情态动词的用法,多做点练习,多看看美剧（可能这个没时间）,然后顺口就能出来了,不过正式考试的时候大多是用法的问题,而不是最后一个那类情景语境的问题.