1_____you be interested in our,please contact us
A.Would B.Should C.Might D.Could
2.If I go there with you,can you ________my safty?
A.make sure B.make sure of C.make sure that
D.sure
3.Never before_______in greater need of modern public transport than it is today.
A.has this city been
B.this city has been
C.was this city
D.this city was
4.Why!I have nothing to confess,______you want mme tosay?
A.what is it that B.what it is that
C how is it that D.how it is that

1)A 2)B 3)A 4)A

1) 应该是祈使句吧，if省略，should提前（貌似是，我语法不大好）
2) Ｄ先排除；Ａ为短语，本身为弄明白(查明白)的意思，后面不加名词，最多是make it sure，所以排除；Ｂ后面加名词；Ｃ后面加从句,所以Ｃ排除。
３）Never before在，必定用完成时态，于是Ｃ与Ｄ排除。Never作为否定词放句首，要倒装，所以选Ａ
４）根据题目意思必定是“问我应该讲什么”，所以用what，Ｃ与Ｄ排除。对于Ａ与Ｂ，可将其填进去换成肯定句来看。
It is (that) what you want me to say.(或者你可以试试把这句改成疑问句），所以选Ａ