—Thank you for your help, Mr. Smith. I’ll hand in my paper tomorrow.—______. You may send it to my mailbox 3 days later.
--- Why do you suggest we buy a new machine?--- Because the old one has been damaged ___________.
-When do we need to pay the balance?-__________ September 30.
A great person is always putting others’ interests _________ his own.
-How amazing it is that astronauts are exploring outer space! -It’s a challenge, I guess, _________man against nature.
When she first arrived in China, she wondered what the future might have_______ for her, but now all her worries are gone.