21、A：I have never been late for school，but yesterday morning…

B：1__________________

A：I overslept．I had watched a football match between China and Brazil the night before last．When I went to bed，it was already 1：00 in the morning．

B：2__________________

A：Yes．But it didn't go off．By the time I woke up，my mother had already gone into the bathroom．I had to wait for her to come out．

B：You had to rush，didn't you?

A：Yes．I took a quick shower and then ran off to the bus stop without breakfast．

B：It's bad for your health if you don't have breakfast too often．

A：I agree．But by the time I got to the stop，the bus bad already left．

B：3___________________

A：I had to take a taxi，When I got on the taxi，I suddenly found out I had left my purse at home．I had no money with me．I had ring my English teacher to meet me at the gate and pay for me．

B：So you could get to school on time，couldn't you?

A：But unfortunately，it was rush hour．The car was as slow as I am taking a walk．

B：4____________________

A：You're right．I got to school very late．And I made an apology to my teacher．

B：What a pity! 5___________________

20、—Tom, try your best．Don't ________ your parents _________．

—Ok，I'll do my best to work hard at my lessons．

A．go，down                  B．make，out           C．let，down              D．make，proud

19、—Jack，________ I forgot my friend's birthday?

—You may phone and say sorry to him．

A．how do                B．what if                 C．when if                  D．How if

18、—Have you finished your homework，Adson?

—No，not yet．

—Then you ________ go out to play basketball．You must finish your homework first．

A．can't             B．mustn't            C．must                D．needn't

17、—Do you know who he invited to his birthday party?

—sorry，I don't know，but I ________ to it this Sunday．

A．invite             B．invited                C．will invite                D．was invited

16、—What do you think of our city?

—I think it is the most beautiful city ________ I have ever visited．

A．where             B．that             C．who               D．because

15、—What are they talking about?

—They are talking about the photos ________ on the Great wall．

A．taking            B．were taken          C．have been taken          D．taken

14、—Why were they made ________ out of the door?

—Because they didn't finish their homework．

A．to stand               B．stand             C．stood                   D．were standing

13、—Why did Tom go back home in such a hurry?

—Because he ________ his text books at home．

A．forgets           B．forgot              C．left                 D．leaves