May I sit here, or is this seat reserved?

Even though I'm quite a reserved person, I like meeting people.

★ reservation n.意为：①预定；②保留意见，疑惑。如：

I'll call the restaurant and make a reservation.

They support the measures without reservation.

【考例1】The power of imagination need not be reserved for children only. (广东2013阅读理解A篇)

【考例2】"It's such a nice place." Mother said as she sat at the table reserved for customers. (浙江2012单项填空)

【考例3】I'd prefer to reserve my judgement until I find all the evidence. (福建2011单项填空)

3. changeable

【点拨】changeable是形容词，意为"可能变化的，易变的，常变的"。如：

The weather is very changeable at this time of year.

Mary experienced changeable moods and panic attacks.

【考例1】According to him, the weather in England is very changeable and uncertain and it attracts the English as well as the outsider. (重庆 2013阅读理解E篇)

【考例2】Increased carbon dioxide (CO2) in the air from burning coal and oil can have an effect on how plants produce oxygen, while higher temperatures and changeable rainfall patterns can change their patterns of growth. (四川 2012阅读理解E篇)