He ____ (manage) to escape from the cave and got rescued by the local police.

    I'm Chinese ，but I am in England now. I can speak English. But I sometimes make mistakes with English. It was sunny yesterday. My class went to the park. I said，“Let's fly cats in the park. ”My classmates all laughed. I didn't know why. Then my teacher said，“Cats are animals. We can't fly them. But we can fly kites. ”“I know my mistake. I wanted to say kites，not cats. ”I said. Then we laughed again. That was funny.

下图中“○”和“●”分别表示不同元素的原子，其中表示单质的是（　　）

你认为以下属于男女同学恰当交往的是(     )