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4. 如果他有空，他會幫助你的。 

If he     ，he      you.

3. 如果明天不下雨，我就和你一起去公園。 

If it      tomorrow,I go to the park      you.

2. 如果他看電視太久，他的父母會不高興。

 If he      TV too much,his parents      unhappy.

 如果你努力學習，就會取得好成績。 

  If you     ，you      good      .

(   ) 5.Your dream will come true      you put your heart and soul into it.

A. if   B. unless 

C. although   D. until

(   ) 4.If it      rain tomorrow,we'll go hiking.

   A. won't   B. doesn't C. don't   D. didn't

(   ) 3.[2014 •威�！絎hy not look up the new word in a dictionary      you don't know it?

   A. if   B. that C. though   D. whether

(   ) 2.[2014 •廣州]Mum says      I do my homework now,I can watch TV for an hour tonight.

   A. if   B. though C. because   D. while

(   ) 1. [2014 '呼和浩特]If we      take environmental problems seriously,the earth worse and worse.

   A. don't;will be   B. won't;isn't 

    C. won't;is   D. don't;won't be

10. If I        (play) games on the computer,it        (go) wrong.