54. 我知道对父母说假话是不对的。
I know 64 is wrong to 65 to my parents.
55.我认为保护环境的最佳办法是多植树。
I think (that) the 66 way to protect the environment is to 67 more trees.
56.在暑假里他大部分的时间都用来上网。
68 the summer holiday he spent most of his time 69 the Internet.
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