After _______ had happened he could not continue to work there.
| A．which | B．how |
| C．what | D．having |
相关试题
Mr .Smith is from Australia , which is to many unique animal species ,like kangaroos and koala bears .
| A．family | B．nation | C．home | D．area |
. It is reported that a bus rolled into a deep valley , 10 deaths and even more injuries . 
| A．to cause | B．having caused | C．caused | D．causing |
--what effect does the medicine have the blood pressure ?
--- well ,it depends how much you take .
| A．with ;on | B．with ; to | C．on ; on | D．on ; to |
It is years I last visited the mine . I wonder how things are getting on there .
| A．before | B．when | C．until | D．since |
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