Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

They ________ be writing their compositions in the classroom now．I saw them in the classroom．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

The tree is dead．He ________ have given it more water．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

The soldier shot his comrades．He ________ have been mad．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

________ you please show us some photos?

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

－________ I use your bike?

－Sure, here you are．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

－________ I clean the classroom before three o’clock?

－No, you needn’t．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

Mary ________ play the piano well when she was quite young．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

You ________ hand your exercise book in at once．You may hand it in on Wednesday．

Complete the following sentences with a proper modal verb．

(用适当的情态动词完成下面句子。)

－________ you explain the sentence again?

－OK．I will．

Complete the sentences with the phrases in the box in their right forms．

(用方框里中短语的正确形式填空。)

1．My mother ________ go shopping when it began to rain．

2．________ I have to sell my house, I’ll keep my business going．

3．Who do you think he will ________ help?

4．Palestine and Israel didn’t ________ the cease-fire agreement．

5．May I ________ your conversation?

6．A man at the ________ the school is asking to see you．

7．You ________ help each other as you are classmates．