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.