13．Half of the ________________ (乘客) on the bus are from America．

12．Children, help ________________ (你们自己 ) to some fruit．

11．They will sell the house with fine ________________ (家具)．

10．Please don't do that again．I think it's a w________ of time．

B) 根据汉语提示，写出空缺处单词的适当形式。

9．All these things can get m________ into many new useful things．

8．I don't know if you have finished f________ the radio set．I want to get it back．

7．We must do something to protect our environment from p________．

A) 根据句意及首字母提示，写出空缺处单词的适当形式。

6．I'm better at history than Jean, but I' m w________ at French．