双基限时练(十一) unit 4 part ⅱ ⅰ.单句语法填空(不多于3个单词) 1．their fur________(use)to make sweaters. 答案 is being used 2．the wool________(take) from under their stomachs. 答案 is being taken 3．a lot of forests________(destroy)，and we are becoming endangered. 答案 are being destroyed 4．much attention________(pay) to the environment around us.
