You look quite tired. You’d better _______ a good rest.

___________a beautiful bird! I’ve never seen it before.

In his speech, Premier Wen Jiabao points out that creativity is ______it takes to keep a nation highly competitive .

s the model plane look like — Well, the wings of the plane are ______ of itsbody.

I had to tell some of them what we wanted to do next, because ________.