三校生英语选择题8题,求详解.1.He ____ have completed his work,otherwise h

三校生英语选择题8题,求详解.
1.He ____ have completed his work,otherwise he wouldn't be enjoying himself by the beach.
A.should B.must C.wouldn't D.can't.B 请问如何解释,为何A不行.
2.____ our food ______,we had to walk to a village for help.
A.Since,runs out.B.Because,run out.C.With,running out D.For,running out.A 可以嘛.since解释为 既然呀.
3.Don't be discouraged._____ things as they are and you will enjoy every day of your life.
A.Take B.To take C.taking D.taken..A .那 C呢.动名词开头嘛.
4._____ more and more forests were destroyed,some animals are facing the danger of dying out.
A.By B.With C.As D.For C.D 不可以吗.因为.
5.All the neighbors admire this family,_____ the parents are treating their kids like a friend.
A.why B.where C.which D.that..完全不理解- -.
6.He will have nothing to ____ if he refuses to listen to his teachers.
A.earn B.catch.C.gain.D.grasp.C.固定搭配嘛?那别的有什么搭配?
7.I promise to ____ the matter as soon as i get back to the head office.
A.look for.B.search for.C.enter into.D.look into.D.
8.Voices were ____ as the discussion between the two groups became more heated.
A.increased.B.repeated.C.raised.C.risen 那D呢.