Ⅰ.单句语法填空
1．He ran into the burning house to save the employee without hesitation.
2．No matter how busy he is，he makes it a rule to read at least 20 minutes a day.
3．After he was retired，his work was turned over to the secretary.
4．Whether the factory will be in the charge of me or not，I will resign.
5．The demand for tea is on the decrease each year.
6．In case he arrives(arrive) before I get back，please call me.
7．Protective clothing must be worn when the machine is in operation(operate)．
8．I would advise people to think very carefully about committing themselves to working (work) on Sundays.
9．The product was developed in response to customers' demand.
10．He asked me if/whether I was good at English.
