【课内基础盘点】
Ⅰ．题目略
1．cost
2．harmful
3．President
4．recycling
5．gate
6．bottom
7．works
8．wooden
9．ugly
10．laws
Ⅱ．题目略
1．pay for 2．make a difference 3．so far 4．is good for
5．turn off 6．played a part in 7．taken part in 8．brought/bring back
Ⅲ ．题目略
1．have an advantage over
2．instead of
3．at the top of
4．the importance of； environment； to protect
5．used to be
6．put time to good use
7．threw away
8．pulled down
Ⅳ．题目略
1．realize 2．catch 3．cruel 4．dies 5．ecosystem
6．danger 7．traded 8．protection 9．develop 10．shown
【课后能力提升】
1．alone
2．air pollution
3．was created/was set up/was built up/was established
4．heaviest/thickest
5．worse
6．For about a week．
7．By walking or riding to work．
8．Because Beijing is heavily polluted．
9．In November, 2014．
10．To cut down CO₂ emissions．