脱蜡深度是指脱蜡后油品（）的高低。
A.闪点
B.凝固点
C.密度
D.粘度
参考答案：B
— If the traffic hadn't been so heavy, I could have been back by 6 o'clock.
— What a pity! Tina ________ here to see you. [ ]
A. is
B. was
C. would be
D. has been
— _______ for your breakfast?
— I'd like some noodles and an egg. [ ]
A. What would you like
B. What do you often have
C. Where do you have
D. When do you have
