一请你用所给词的适当形式完成下列句子1.?????? You are ______ (suppose) to shake hands when you meet a Chinese friend.2.?????? Keep your eyes ______(close) when you are doing eye exercises.3.?????? A knife is _____ (u

(三)用所给词的适当形式填空【河北省2011】82. They have invited a_________(science) to give them a speech on space.83. Mrs. Chan told us to write as_________(care) as we could.[来源:学科网]82.scientist 83. carefully【2011江