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  Economic development has also _________   ___________ to environmental problems.

2. ÎÒÃÇÓ¦¸Ã²ÉÈ¡´ëÊ©À´·ÀÖ¹µØÇòÊÜÎÛȾ.

We should __________  _____________  to prevent the earth from being polluted.

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    We tried every means to get him to ___________  _____________.

4£®ËûÃǺÜÇµ«»¹ÊÇÉè·¨°Ñ¶ù×ÓËÍÈ¥´óѧ¶ÁÊé¡£

They were poor, but they__________  ___________ send their son to college.

5. ÎÒΪ×òÌìËù×öµÄÊÂÏòÄãµÀǸ¡£

    I ______________  ____________  you for what I did yesterday.

 

 

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1. given, birth  2. take measures  3. cheer up  4. managed to  5. apologize to

 

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