—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report.
| A．can't | B．mustn't | C．needn't | D．won't |
This machine, ______for many years, is still working perfectly.
| A．after which I have looked | B．which I have looked after |
| C．that I have looked after | D．I have looked after |
This is the reason ______he didn't come to the meeting.
| A．in which | B．with which | C．that | D．for which |
The way ______he looks at problems is wrong.
| A．which | B．whose | C．what | D．/ |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
I have bought such a watch _______ was advertised on TV.
| A．that | B．which | C．as | D．it |