Written Part (笔试部分)(共100分)
Ⅰ.complete the sentences with the given words in their suitable forms.(用所给词的正确形式填空) (10分)
1.I think there ________ (be) fewer trees next year.
2. He _____ (collect) 300 pictures since 5 years ago.
3. Sam always ______ (hel...