I．题目略。 1．make a difference 2．pull down 3．turn off 4．pay for 5．be full of 6．clean up 7．put sth． to good use 8．cut down 9．instead of 10．be good at 11．cut off 12．be good for… 13．upside down 14．be made of/from… 15．throw away 16．听说 17．恢复；使想起；归还 18．建立 19．参加 20．在……中起作用 Ⅱ．题目略。 1．used to 2．turn off 3．pulled down 4．is made from 5．cut down 6．instead of 7．is known for 8．set up 9．put; to good use 10．throw away Ⅲ．题目略。 1．built; out of rubbish 2．is made from 3．h

I．题目略。 1．make a difference 2．pull down 3．turn off 4．pay for 5．be full of 6．clean up 7．put sth． to good use 8．cut down 9．instead of 10．be good at 11．cut off 12．be good for… 13．upside down 14．be made of/from… 15．throw away 16．听说 17．恢复；使想起；归还 18．建立 19．参加 20．在……中起作用 Ⅱ．题目略。 1．used to 2．turn off 3．pulled down 4．is made from 5．cut down 6．instead of 7．is known for 8．set up 9．put; to good use 10．throw away Ⅲ．题目略。 1．built; out of rubbish 2．is made from 3．h