It takes us about ____ hour to get to the Yangzhou-Taizhou Airport from Taizhou by ____ bus.

There are a lot of apples ______ the tree and some birds are ______ the tree, too. [ ]

What did Tom ask you yesterday morning? — He asked me if I _______________ to Beijing with him this Saturday.

The earth is years old.

The result is so ______ that we can hardly believe it.