Please excuse me _______ your letter by mistake.
The classical Chinese folk music ________ a wave of homesickness among the overseas students.
The handicrafts, ________ had been made by the students, were sold out soon.
Each application letter should be ________ by a stamped and addressed envelope, so that we can reply to you in time.
It is now generally believed that a good teacher should be ________ to his/her students.
– Sorry, but I must be off now. Better check everything again.– Ok. ________.