The machine I have looked after for twenty years is still working well.

—The film Tangshan Earthquake will be at 7:30 pm. Shall I pick you up at 6:40 pm?—OK, I ________ you at that time.[ ]

.Don’t forget ________ your homework tomorrow.

.The Red Army ____ more than 25,000 li and arrived at North Shanxi at last.

Imagine a situation_____two strangers are talking to each other.