请帮我填几个空1.-Could I use your computer?-Sorry,I am working ____

请帮我填几个空
1.-Could I use your computer?
-Sorry,I am working ____ it.
“对不起我正在用”这个题目我是这样理解的,请帮我填一下
2.____ his next day ____,he wants to go ____ a drive.
3.My friend Peter and I have some things _____ common.
4.I am going to study _____ the English test _____ Thursday evening.
就是这几个了
第二题我核对过了，没有打错，可能是题目出错了
看不懂啊