45. If I ............ this exam, I'll go to the university next summer.
A.pass          B.to pass         C.had passed            D.passed
46. "Here's my phone number." - " Thanks, I...................you a call if I............some help."
A.will give/will need            B.would give/needed
C.give/need               D.will give/need
47.I....................you if you need my help
A.am helping            B.could help           C.will help            D.helped
48.If we use........................paper, we will save a lot of trees.
A.fewer           B.less           C.more         D.much
49. We might have a .....................TV to watch TV programmes from space.
A.wireless          B.remote           C.automatic             D.local
50.We might have robots...........our meals.
A.cook           B.to cook           C.cooking         D.to cooking