閱讀下列各小題，根據(jù)括號內(nèi)的漢語提示，用句末括號內(nèi)的英語單詞完成句子，并將答案寫在答題卡上的相應(yīng)題號后。

66. ---I will study hard and ________________________________(盡力不讓父母失望). (let)

   ---You are really a nice boy!

67. ---What was Tom doing when you walked past him?

   ---He ______________________________________(正在找他自行車鑰匙).   (key)

68. ---Are you writing to your sister?

   ---Yes. She moved to England last month. She ________________(一定正在盼望收到我的來信). (forward)

69. ---Miss Li, it __________________________________(解出這道題我有困難).   (work)

   ---You may ask Lucy for help.

70. ---Did you meet Mr. Green at the airport?

   ---No. By the time I got there, he _____________________(乘公交已離開十分鐘了). (be)

71. ---Jack, it seems that you like to work with animals.

   ---Yes. I think animals ________________________(應(yīng)該被認(rèn)為是我們的朋友). (regard)

72. ---Do you like Mrs. Smith?

---Yes. She is_________________________(非常友好,他總是讓我有家的感覺). (that)