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素能提升演练（十八）
Book Ⅱ Units 13~14
Ⅰ. 单词拼写
1. He is glad that you will ______（获益）from his speech.
2. These plants ________ (漂浮)on the surface of the water.
3. Did you _______ (理解) everything the professor said?
4. They are making every effort to ______ (减少)the production costs.
5. If you break your word，he will never ______（相信） you again.
6. Long _______（分离） of the boy from his mother could lead to psychological problems.
7. It was a pleasant surprise to learn of her ________(结婚).
