13.James Watt ______ the steam engine.

13.James Watt ______ the steam engine.
a.was inventing b.invented c.had invented d.has invented
14.We had hoped ______ the game,but the other team played very well.
a.State University to win b.that State University win
c.that State University would win d.State University`s winning
15.It ______ every day so far this month.
a.is raining b.rained c.rains d.has rained
16.“The possibility of a flood was just reported over the radio.”
“I know.I heard about it.The river______ the top of its bank.”
a.was reached b.reaching c.had been reached d.has reached
17.My history teacher ______ my test.
a.has not yet graded b.will not grade
c.is to be not grading d.must to grade
18.Do not disturb me.I ______ letters all morning and have written ten so far.
a.write b.have written c.was writing d.have been writing
19.“Was the driving pleasant when you vacationed in Mexico last summer?”
“No,it _______for four days when we arrived,so the roads were very muddy.”
a.was raining b.would be raining
c.had been raining d.have rained
20.The construction of the laboratory ______ before the end of next month.
a.must have completed b.must have been completed
c.must be completed d.must complete

13.James Watt ______ the steam engine.
a.was inventing b.invented c.had invented d.has invented
选b.
瓦特过去发明的蒸汽机,用过去时.
14.We had hoped ______ the game,but the other team played very well.
a.State University to win b.that State University win
c.that State University would win d.State University`s winning
选c.
没有hope sb.to do sth.排除a项.
hope + 句子,主句用had hoped过去完成时,从句要用would win.
15.It ______ every day so far this month.
a.is raining b.rained c.rains d.has rained
选D so far用于现在完成时.
16.“The possibility of a flood was just reported over the radio.”
“I know.I heard about it.The river______ the top of its bank.”
a.was reached b.reaching c.had been reached d.has reached
选d.根据文意.“洪水只能通过收音机报道.”“我知道.我听见了.河水已经到了河岸顶部.”
17.My history teacher ______ my test.
a.has not yet graded b.will not grade
c.is to be not grading d.must to grade
选a .译文：我的历史老师还没判我的考试卷.
18.Do not disturb me.I ______ letters all morning and have written ten so far.
a.write b.have written c.was writing d.have been writing
选d .强调一直在做不一定现在结束.
19.“Was the driving pleasant when you vacationed in Mexico last summer?”
“No,it _______for four days when we arrived,so the roads were very muddy.”
a.was raining b.would be raining
c.had been raining d.have rained
选c.for four days四天,“for + 一段时间”用完成时,整体是过去时,所以用过去完成时.
20.The construction of the laboratory ______ before the end of next month.
选c,因为时间是将来的,所以用must be completed.表示一种推测.