88．The moon isn't as big as the earth．(改为同义句)

87．They go to the zoo two or three times a year．(对划线部分提问)

按括号内的要求改写下列句子。

86．You should study for the chemistry test this weekend．(改为否定句)

75．It's important for her to enjoy 　　　　　　　　　 　　music and get relaxed．

C)根据文意，用括号内所给动词的正确形式完成短文。

Thanks a lot for the invitation．I'm sorry I can't 　76　 (visit)you next week．I 　77 (have)a really busy week．On Monday, I have to 　78 　(go)to the doctor．On Tuesday I'm 　79　 (have)a piano lesson．On Wednesday, I'm 　80 (study)for the English test．On Thursday,　 I have to 　81 (play)soccer with my friends．On Friday,　 I'm 　82　 (help)my mother．On Saturday, I have to 　83　 (babysit)my brother and 　84 　(do)homework．Please 　85 (call)me after the vacation．

74．He'd like to get some 　　　　　　　　　 　　in the newspapers or on TV．

73．There are about five 　　　　　　　　　 　　students in the school．

72．Li Tao 　　　　　　　　 　　to climb the tree, but he couldn't．

71．-- How far is it from your home to work?

-- It's about three 　　　　　　　　 ．

70．After running a long time, he gets 　　　　　　　　　　 ．

69．I have no car．So I have to 　　　　　　　 　　the buses．