观察法多数是（）式观察，适用于定性类型的调查研究。
参考答案：非结构
客户拨打96336如何计收话费？（）
A、省内按市话费收取
B、省内跨地市按当地漫游费收取
C、省外按长途话费收取
D、省外按市话费收取
First the car broke down, and now I can't find my keys! If it's not one thing, it's _____.[ ]
A. another
B. other
C. the other
D. others
