He refused to sell the old house, for it had too many pleasant ________with his childhood.

Don’t forget to ________ your homework to school.—I ________, Mr Li.

Our holiday cost a lot of money.—Did it? Well, that doesn’t matter ________ you enjoyed yourselves.[ ]

He wrote a long moving poem _________ Qian Xuesen who is known as “ Father of Chinese Rocketry.”

It was required by the headmaster that all the students at the meeting.