一、阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
1．—How much of the foreign expert’s speech have you understood?
—Next to nothing, I wish I ________(work) harder at English.
2．While floating you have to wear a helmet and a life jacket for ________(protect), just in case you fall into the water.
