应当进行中华人民共和国国籍登记的航空器包括（）
A、小型飞机
B、大型飞机
C、国家机构的民用航空器
D、飞船
参考答案：C
用所给单词的适当形式填空。
1.—How is the ____ (weather ) in Chongqing?
—It ____ (rain) now.
2. Do you like ____ (wind) days?
3. Today is ____ (sun). Let's go shopping.
4. ___ it ____ (snow) in Moscow now?
5. My friend always ____ (study) hard at school.
