I __________the poor rabbit, but I didn’t have the right drugs with me at that moment.
| A．could save | B．had saved | C．could have saved | D．saved |
He is working hard, ______will make him pass the final exam.
| A．that | B．which | C．for which | D．who |
The reason ______he didn't come was ______he was ill.
| A．why; that | B．that;why | C．for that;that | D．for which;what |
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．/ |