①跌倒; 倒塌
②多次; 反复地
③未来; 将来
④大量; 许多
⑤醒来
①be able to
②space station
③look for
④help sb. with sth.
⑤make sb. do sth.
— _________. They can't live so long.
— I don't _________ you. They are both useful.