56. We wondered why he refused to make an ____________ (apologize) for his being late. 57. Jack was busy ___________ (chat) with his friends while Tina was collecting information on line. 58. I discovered my son had a gift ___________ painting quite by accident. 59. On the moon, a person only ___________ (weight) one sixth of his weight on the earth because of the change of gravity. 60. She called me yesterday evening but I didn’t hear it. I ____________ have been asleep. 61. I found ___________ amazing that my one-year-old baby cousin could play mobile games! 62. It is good __________ (manner) to offer your seat to an elder on a bus.! 63. You ____________ hand in your application today. Next Monday is the dead line. 64. What the doctors doubted was _____________ the patient would recover from the serious illness. 65. _________ he finished writing a composition in such a short time surprised us all.
答案:1. apology 2. chatting 3. for 4. weighs 5. must 6. it 7. manners 8.needn’t 9. whether 10. That