根据下列句子中所给汉语注释，在句子右边的横线上，写出空缺处各单词的正确形式。 1. Tom is good at

根据下列句子中所给汉语注释，在句子右边的横线上，写出空缺处各单词的正确形式。

1. Tom is good at _______ (体育运动).
2. Lin Hao is a _______ (勇敢的) boy.
3. Mr White _______(问候) us politely yesterday.
4. The school runs three language_______ (课程).
5. We found the house without _______(困难).