行为规范类词汇与短语 — 英语句型题

选用方框中的短语补全句子，每个短语用一次。pay attention to the teacher；wait in line；help an old man ① At the bus stop, Tom doesn’t push. He ______. ② In class, Amy looks at the teacher and listens carefully. She ______. ③ On the way home, Ben sees an old man carrying a heavy bag. He ______.