问题详情：
61. He held on _________the rope , and slipped down the cliff slowly.
62. You must devote your full attention________ what you are doing.
63. What is the theory based__________.
64. There is some doubt_______ he is the best man for the job.
65. No sooner had the boy spoken these words ________ the warden hit him on the head with the soup spoon.
66. The book is intended__________ children aged 5～7.
67. I was astonished ____________the news of his escape.
68. Lay these books ________________ you can find them easily.
69. She is acknowledged_______ _ the best tennis player in the world.
70 . —Why do you look pale today?
【回答】
1. to 2. to 3. on_4. whether 5. than 7at 8 where t
知识点：其他
题型：未分类
