–Michael was late for Mr. Smith’s oral class this morning.
--_____? As far as I know, he never came late to class.
| A．How come | B．So what | C．Why not | D．What for |
US Apple decided to expand its business in China in response to an increasing demand ______ digital product.
| A．of | B．from | C．to | D．for |
We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.
| A．what | B．those | C．that | D．one |
I witnessed the gate of the bank _______ open and many men entering it, but I couldn’t make them out in the darkness.
| A．force | B．be forced | C．forcing | D．being forced |
— I didn’t care about what other people thought about me.
— Well, you ________.
| A．should | B．ought to have | C．would have | D．could |
As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
| A．it | B．what | C．which | D．that |