用所给词的适当形式填空：

It's really ________ for a child of five to take care of himself．(possible)

用所给词的适当形式填空：

Our government is doing something useful to solve the ________ problems．(environment)

用所给词的适当形式填空：

The old lady looked ________ at me．(angry)

用所给词的适当形式填空：

My desk mate looked ________, for he failed in the English test．(happy)

用所给词的适当形式填空：

I don't believe she told us the ________．(true)

根据句意和汉语提示，将单词的正确形式写在相应的横线上。

Which are ________(重的), elephants or sheep?

根据句意和汉语提示，将单词的正确形式写在相应的横线上。

I like ________(土豆)a lot, and my mother usually cooks it in different ways．

根据句意和首字母提示，将单词的正确形式写在相应的横线上。

We were glad to celebrate our motherland, China's s________ birthday on October 1st, 2009．

根据句意和首字母提示，将单词的正确形式写在相应的横线上。

You must stop s________, nicotine(尼古丁)is bad for your health．

请根据所给中文提示，写出单词在句中的正确形式。每空只能填一词。

When you ________(接受)a present, you must use both hands．It's a traditional custom in China．