1.They'd better（ ）at two.A.start B.to start C.started D.starting
2.May I borrow your ruler?----Yes,you___ A.need B.may C.can D.must
3.Who can ___ your pen pal?-----Marry can.A.is B.am C.are D.be
4.Everything（ ）fast in spring.A.begin B.grow C.grew D.grows