如果有人对你说:“I’m sorry.”你应该怎么回答: A.Thank you.B.You’re welcome.C.It’s OK.
How long has he_______the job?
—_______ have you been studying English? —Since 2002.
It’s cold here. Please keep the window_________.
Simon heard his neighbor _________ for help at night.
An old friend of my sister’s always helps my brother and _________ with _________ lessons.