高一英语几道选择题请教

高一英语几道选择题请教
1. He told us he _____ a concert.
A.had attended , three days before
B.attended ,a week ago
C.would attend , since a week ago
D.was attending ,for a week
我选择了B ,但是老师说正确答案是A ,但是老师也曾经说,过如果在句子中出现了具体表示过去的词,那么在变为间接引语时,过去时通常不变 但是这句话中有表示具体时间的词 却用了完成时态 为什么啊 好纠结、、 、
-When Tom ______,please let me know
-Mary said when Tom_____,just tell her about it.
A.comescomes
B.camecame
C.comescame
D.comescoming
正确答案是C 我选了A 这个题目是第二个填空搞不清楚难道从句里的从句也要变时态吗?
Mother came here and asked me ______
A.what was the problem
B.what the problem was
C.what is the problem
D.what the problem is
老师讲过 在从句中有几个句子是不用变语序的 比如：What's the matter /what's wrong 都不用变 但我想不到 what's the pronlem这句话和那两句话有什么区别它就要变语序了呢?
He asked me ______that book was Susan's______Lily's.
A.if , orB.if ,and
C.whether 'orD.whether , and
这句话的第一空该填 if 还是 whether 呢?这两个词都是是否,在用法上有什么区别吗?
这几道题郁闷了老久 帮帮忙啊、