选词填空，补全对话。
A: —I’m 1. ________ (sad; excited) because we’re going to climb the mountain.
B: —That’s 2. ________ (gray; great).
A: —I’m 3. ________ (scared; tired).
B: —Why are you scared?
A: —Because she’s going into the cave. I heard a 4. ________ (toys; noise).
B: —Be careful!
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