根据句意及首字母提示补全单词。
1. — Yao Ming is tall and strong.
— Yes. He is c_________.
2. The apple is g_________. Please give me a red one.
3. Here's a pencil. C_________ it yellow, please.
4. They are from Canada. T_________ eyes are grey.
5. The teacher is old, but the students are y_________.