三、用情态动词填空
Kate and Betty live in the same community. They often play together after school. Both of them are kind and helpful.
One Saturday afternoon, Kate and Betty were playing in their community when they noticed a wallet under a stone bench(长凳). They walked over and picked it up.
“Whose wallet 1 this be?” asked Kate.
“It 2 be Mr. Brown's, but I'm not so sure,” answered Betty. “You know he enjoys sitting here from time to time.”
“It 3 be his, because he has gone to London for a holiday. I think it 4 be Mr. White's, because he has formed the habit of sitting here to relax in the morning every day since he retired(退休).”
The two girls took the wallet and walked towards Mr. White's house. They rang the doorbell and Mr. White opened the door.
“Hello, Mr. White! Is this wallet yours?” they asked.
“Oh, no. My wallet is here,” replied Mr. White.
“ Whose wallet do you think this 5 be?”
“Let me see. Hmm... I think it 6 be Mr. Black's or Mr. Jackson's. Oh, no. It 7 be theirs because they have been away to visit their friends for three days. Oh, I remember now that Mr. Green has been looking for his wallet all morning. I noticed him sitting on the stone bench about half an hour ago. I think it 8 be his.”
Mr. White made a phone call to Mr. Green right away. A few minutes later, Mr. Green arrived. He recognized(认出) his wallet as soon as he saw it. He thanked Kate and Betty again and again.
1. 2. 3.
4. 5. 6.
7. 8.

1. can 2. may 3. can't 4. might 5. could
6. may 7. can't 8. must