______ one-hour documentary takes _______ close look at the life of giant pandas in Wolong.
I’m new in Wuxi. — Take a map of Wuxi with you.You’ll find it of great ________ in helping you to get round Wuxi.
The careless driver knocked down the old man _________ was crossing the road.
Is this _____ English book–No, it isn’t. It is _____.
I don’t know if it tomorrow. If it ,we won’t go hiking.