[课 堂 检 测]
Ⅰ.用所给词的适当形式填空
1．That means a transparent object doesn’t look very different from the ________ (surround) air or water.
2．I had a strong desire to reach in and play with the toy，but was held back ________ (thank) by the shop window.
3．Sometimes this can be a ________(advantage)，while in other situations this is a very useful feature.
4．I went________ (direct) to the bar and ordered a bottle of soda.
5．My uncle hasn’t been able to quit ________ (smoke)，but at least he has cut down.
