1 . 请根据句意选出词组并以恰当的形式填空。（注意有2项剩余）

1. You’ll find a simple and straightforward __________ solving the problems you face every day.
2. The theory wasn’t _________________ facts though it sounded reasonable.
3. Not everyone is unwilling to fight ______________ his country, I think.
4. Mary ____________________ her new red car, for it is of good quality and didn’t cost much.
5. He has been there many times. ________________ he doesn’t approve of the plan going there for holiday.