单词辩音 请找出一个划线部分读音与其他三个不同的选项并将该选项填 入答题卷上相应的空格内（本大题共5分，每小题0.5分）
Talking with foreigners is a useful way to ____ /ɪm'pru:v/ our English.
We should eat more fruit and vegetables to keep ______/'helθɪ/.
Please open the window and let the _____ /freʃ/air in.
Library is a good ______ /pleɪs/ to study for a test.
I go to school every day on my new _______ /baɪk/.
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