Ⅰ.单句语法填空
1．Cindy shut the door heavily and burst into tears.No one in the office knew why she was so angry.
2．The possibility that there is life on other planets in the universe has always inspired scientists to explore the outer space.
3．It is uncertain whether the medicine will bring about side effect.
4．One reason for her preference for city life is that she can have easy access to places like shops and restaurants.
5．Whoever enters the computer room should take off his shoes in order to keep it clean enough.
6．She has been working for nearly four hours so what she needs to do now is have a good rest.
7．I am afraid he's more of a talker than a doer, which is why he never finishes anything.
8．What matters to museums is not how many visitors they have，but how close they are to people's daily lives.
9．I forgot how complicated these decisions can be!
10．I have no idea who will be in charge of the company when the manager is away.
