I.单词拼写（15分）
A）请用给出单词的正确形式填空。
1. The seas around Australia contain over 160 different kinds of shark, which _________（various）in size from just 20 cm to over 14 m.
2. If we had known of your _________（depart）, we would have seen you off at the airport..
3. I’m sorry you can’t sit there. This table is _________（reservation）
4. When first _________（introduce）to the market, the products didn’t attract much attention.
