阅读下面短文，用括号内所给词的适当形式填空(必要时可加情态动词或助动词)
Mr. and Mrs. Brown live in a small house
near London with their two children. Sometimes, Mr. Brown {#blank#}1{#/blank#} (come)
back from work very late. If his wife and children {#blank#}2{#/blank#} (be)
asleep(睡着的), he will open the front door of the house with his key and go in
very quietly. He doesn't want {#blank#}3{#/blank#} (wake) them up. But one night
when Mr. Brown came back late, he {#blank#}4{#/blank#} (can) not find his key.
So he had to ring the bell, but no one {#blank#}5{#/blank#} (answer) the door.
He rang it again, but nobody came to open the door for him. At last he
{#blank#}6{#/blank#} (stop) and {#blank#}7{#/blank#} (think) for a few minutes.
Then he started to speak quietly like a little kid, "Mom, I want to drink
water!" Mrs. Brown woke up at once.
