to

　　　　for a long time, but he tried his best to catch up with his classmates.

—Hello, Kate! Fancy meeting you here! Working again, are you?—Yes,______,if I want to pass the exams.

–Is there anywhere you’d like to go this summer vocation?-________

-Excuse me, I did not mean to bother you.----_________________.

--Can I speak to Mr. Wang, please?---- ____________

In the modern technological world the sea offers many ______ to help mankind survive.

-Would you like to order now?-----_________________________

----I must be leaving now. It'll be 3hours’ drive to get there.----_________________________

—I'm afraid his radio is too noisy. Will you please _____ him to turn it down?—Sure.

How close parents are to their children　　　　a strong influence on the development of the children's character.