1. 我有许多家庭杂务要做.
    I have so many_________                              .
2. 我去年就停止用餐巾纸.
    I_________               paper napkins last year.
3. 我们应该爱护动物,关爱地球.
    We should                 ________                 animals and care about the earth.
4. 回收纸对于拯救树林来说很重要.
    It is important to____               to save the trees.
5. 洗头的时候你最好关掉淋浴器.
    You'd better_______             the shower when you wash your hair.

1. This is a ruler. (对画线部分进行提问)
     _____ _____ this?
2. It's M-E-N. (对画线部分进行提问) 
     _____ do you _____ _____?
3. It's his jacket. (改为否定句) 
    _____ _____ _____ _____.
4. It is my mother's watch. (改为一般疑问句，并作否定回答)
    —  _____ _____ _____ mother's watch?
    — _____, _____ _____.
5. Is that a key? (做肯定回答)
    _____, _____ _____.
6. It is not my book. (缩写句子)
    _____ _____ my book.

1.保持健康对我们来说很重要.
   It is important for us ______ _______ _______.
2. 我们应该知道怎样学习.
    We should know _______ _____ _______.
3. 运动员每天需要大量的能力进行锻炼.
    Every day a player needs ________ _______energy _______training.
4.稍等,汤姆马上就来. 
   ______ ______ _______,Tom is coming.
5.黄河公园的确是个好玩的去处.
   Huanghe Park is a________ good place ____ ____.