ⅰ.单词拼写 1．a teacher shouldn't show too much ________(偏爱)to one of his students. 2．the ceo of the company said that he should owe his ________(成功) to all his members. 3．i must ________(道歉) to you for replying to your letter so late. 4．i can't ________(想象) what will happen if i lose this opportunity. 5．i had ________(怀疑)about its result at first. 6．________(确定地)i believe the environment will become better and better.
