一.
1.Will you please keep the library clean
二.
A：The museum is still __closed__ .We came here early.
B：___when___ dose it open?
A：At nine o' clock.
B：We have to wait for ___about___ 10 minutes.Have you even been here?
A：Yes,several __times_____.
B：Are there any interesting ___guns____?
A：Of course,there are.You can even see some old guns.
B：They were ___widely___ used in old days.
A：I think they can make you ___know____ of the history of our country.And you will
have more love for our __lives____.
B：Yes,oh,it's already 9:10.What's the ___matter____?
A：Ah...let me see.I'm sorry I forget.There is something wrong with the __front____ door.
The side door is used as the entrance.Let's go to the side door.