With the boy_______ the way, we had no difficulty_______the way to the West Lake.

Lewin was interested in taking research beyond books and looking at how it could________real social change

Do you really want to go out? —It may rain________ I shall go out; I don’t mind the rain

He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring

mmer Palace is really beautiful In fact, Idoubt whether China has _________ park