题目

Complete the sentences with the given words in their proper forms: （用括号内的单词的适当形式填空）【1】My boss asked me to do a project on______. (pollute)【2】I have made a ______ to go on a diet. (decide)【3】When Mary got home, Eddie was lying in the sofa______. (comfortable)【4】Stella gave an ______, but I still didn’t believe her. (explain)【5】Air keeps us______. Everybody should help fight air pollution. (live)【6】All the villagers were ______ to hear the news.(delight)【7】Every morning, my mother does some______ before going to work. (clean)下列各数：，0， 4.2121121112，，其中无理数的个数是（ ）A、4个 B、3个 C、2个 D、1个