I was _______( 焦虑的 )about the children when they didn’t come back home from school. 2.What _______( 使恼怒 ) me is that he won’t even listen to other people’s suggestions. 3.She is not an _______( 外向的 )person and she doesn’t let anyone know what she truly feels. 4.We felt at home with her and were _______( 给 ...... 留下印象 )with the depth of her knowledge. 5.The appearance of a spaceship makes it possible for us to _______( 探索 )the moon. 6.Tom arrived at school late again,which made him feel _______( 令人尴尬的 ). 7.How to do the _______( 实验 )has not been discussed yet.