找出题目中字母所含元音音素不同的选项：
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Alice didn’t go to the park ___ her illness.
| A．because | B．but | C．so | D．because of |
The blue coat is the cheapest and the red coat is the second _________
| A．cheaper | B．cheapest |
| C．the cheapest | D．cheap |
It’s important _____ healthy. Do you think so?
| A．to stay | B．stay | C．staying | D．to staying |
-- ____ is the population of your city?
-- About seven ____.
| A．How many； million | B．What； million |
| C．How large； millions of | D．How much； million |
Usually, we like to _________ before doing sports so that we can't hurt during the sports.
| A．cheer on | B．point at | C．warm up | D．ask for |