【1.Nancy___she___herlifeforhiscountry.A.said,hadgivenB.says,willgiveC.said,wouldgiveD.said,gave2.Hehastaughtinhighschoolsincehe___work.A.begantoB.beginstoC.beguntoD.beginsto3.Look!Here___ateacher.A.cameB.comesC.is】

　　1.Nancy___she___herlifeforhiscountry.

　　A.said,hadgivenB.says,willgiveC.said,wouldgiveD.said,gave

　　2.Hehastaughtinhighschoolsincehe___work.

　　A.begantoB.beginstoC.beguntoD.beginsto

　　3.Look!Here___ateacher.

　　A.cameB.comesC.iscomingD.hascome

　　4.He___anewfilmafterschooltoday.

　　A.seesB.isgoingtuseeChasgonetoDsee

　　5.BeforeMr.WhitewenttoParishe___Frenchfortwoyears.

　　A.willlearnB.haslearnedC.hadlearnedD.waslearning

　　我都知道答案,但是应该怎么解释呢?

　　1.C2.A3.B4.B5.C

　　但是第三题为什么要用一般现在时而不用进行时呢？

　　还有主语后面能不能跟动词的过去分词呢？