66. Is＿possible to fly to the moon in a spaceship?

67.I consider____ my duty to help you．

68 It was at four o'clock in the afternoon ____ he and his grandpa reached the museum in Guanghan.

73.Joan had often heard____ said that Marley had no money.

80.It was not until 1920 ______ regular radio broadcasts began.

82.I was only when I reread this poems recently _____ I began to appreciate their beauty.

84.It is theability to do the job _____ matters not where you come from or what you are.

85.We all thought ______ a question ________we could raise enough money for the project.

91.You will find as you read fiats book that you just can’t keep some of these stones to ______. You will want to share them with a friend.

101. I’d appreciate ____ if you would like to teach me how to use the computer.