Ⅰ.用所给单词的适当形式填空
1．Everyone was a bit________(puzzle)by her sudden departure.
2．I consider that it is________(harm) for students to play computer games，though some of them don't think so.
3．Some believe in the________(exist)of life on Mars，while others consider it as a myth.
4．It's________(like)him to be late；he's usually on time.
5．I could feel the wind________(gentle) blowing through my hair，it was a warm summer breeze.
6．Not all people are aware of the various effects of________(globe)warming on Earth.
答案：1.puzzled 2.harmful 3.existence 4.unlike 5.gently
6．global
