七年级英语练习请说明理由!答得具体才能得分.

题目

七年级英语练习请说明理由!答得具体才能得分.
1The boss asked Tom to do a lot of work.So he______late tonight.
A.needs to work B.need to work c.needed to works D.need works
2.It takes less time ____by air than by train.
A.traveled B.to travel C.traveling D .traveler
3.It was first time for Betty to take a plane,sa it's an ___(excited)trip.(用所给的词的正确形式填空)

答案

1A he 是第三人称单数,所以谓语如果是实意动词,应该有人称变化,need改用单三形式needs need 做实意动词时有need to do 即,动词不定式做宾语
need 还可以是情态动词,情态动词没有单三形式,情态动词后加动词原形
所以,B若need是情态动词应去掉to,若是实意动词应变为needsD同理
C,由语境知,他今晚有许多事儿要做,不应该用过去时
2 B take some time to do something 固定句型,花费时间做某事
3exciting 形容物,令人兴奋的旅行
excited形容人,兴奋的,如：he is
excited他很兴奋