补全对话
( At the beginning of the trip to Mount Hood)
J=Jack  L=Lynn  S=Sue
J: OK, everybody. I’m very glad to lead the team. Are we all ready?
L: Wait! Has everyone put on sunscreen?
S: Oh, dear! ______
L: Here you are. Use mine. Put on some quickly. It can stop the sun from hurting your skin.
S: Thank you.
J: _____ especially because this is Sue and Lynn's first time to have such a trip.
L: All right, Jack.
J: Rule number one, don't walk by yourself. We don't all have to stay together, but don't go somewhere by yourself.
S: No problem. ______
J: OK. And rule number two, keep the mountain beautiful. ____ Don't litter around. We want others to be able to enjoy this beautiful place, too.
L: I know what you mean. _______.
J: Well, those are the two most important rules. If I think of anything else, I'll tell you on the way. So let's go!
All: Yeah! All right! Let's go!

A．Don't pick the flowers.

B．We all know we are a team.

C．I've put on some.

D．I forget.

E. And I have to give you a couple of rules before we start,
F. It also makes me sad when I see people have littered all over.