题目内容
6．If it _______tomorrow，we _________ go to the park．（ ）| A． | isn't rain，will | B． | doesn't rain，will | ||
| C． | won't rain，will | D． | doesn't rain，will be |
分析 如果明天不下雨，我们将去公园．
解答 答案：B．根据题干，本句的意思是如果明天不下雨，我们将去公园．本句是if引导的状语从句，应符合"主将从现"原则，即主句用将来时，从句应该用一般现在时．故排除C．又根据rain是动词原形，而be动词后面不能跟动词原形，故排除A；根据go也是动词原形，应排除D．故选B．
点评 做本题的关键是掌握条件状语从句的主将从现原则，根据本原则确定选项．
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First，my family try to save （36）D．We never leave the lights on when leaving the rooms．We turn off the TV when （37）D is watching it．Mom only uses cold water for the washing machine．
Second，we also pay attention to recycling．We （38）A to write on both sides of the paper，not just on one side．We also （39）C our rubbish into different bags for bottles，cans，paper and food．Mom keeps the plastic shopping bags from the supermarket to use them again as rubbish bags．These are great （40）A to help protect our environment．
Third，my family also save water．We never take long baths and have short showers （41）B．We wash the toilet with used water．My sister and I don't （42）A the tap （水龙头） running when we brush our teeth．
At last，mom and dad decide to save gas from now on．Mom（43）D to drive us to school，but now my sister and I start riding our bikes to school．It's hard work （44）Cgood exercise!This week dad and his workmates also start to go to work together in one （45）B and share the cost．This also help reduce greenhouse gases．
I think these are great ways to help save our earth．Let's take action right now together!
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| 37．A．everybody | B．somebody | C．anybody | D．nobody |
| 38．A．try | B．keep | C．refuse | D．want |
| 39．A．buy | B．check | C．divide | D．change |
| 40．A．ways | B．news | C．information | D．advice |
| 41．A．already | B．instead | C．again | D．too |
| 42．A．leave | B．leaves | C．leaving | D．left |
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| 44．A．or | B．for | C．but | D．and |
| 45．A．bus | B．car | C．subway | D．train |