几个英语问题1．The book __ the test of time.Over 200 years after it

几个英语问题
1．The book __ the test of time.Over 200 years after it was written,it’s been very popular.
A．will standB．has stoodC．had stood D．is standing
2.__ I sit here for a while__ I'm wanted?
A.Could,unless B.Could,so that C.Shall,in caseD.Shall,until
3.___,my father used to send me to school on a bike.
A.Whenever is possible B.Whenever possible
C.When it is possible D.When is it possible