It rained heavily in the south, serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |
“John took a photograph of you just now.” “Oh, really？ I ______.”
| A．didn’t know | B．wasn’t knowing |
| C．don’t know | D．haven’t known |
The buses, most of _______ were already full, were surrounded by an angry crowd.
| A．that | B．it | C．them | D．which |
When I arrived at the company, the manager ______, so we had only time for a few words.
| A．just went away | B．had gone away |
| C．was just going away | D．has just gone away |
David is such a good boy _______ all the teachers like.
| A．that | B．who | C．as | D．whom |
The thief tried to break away from the policeman who ______ him, but failed.
| A．has held | B．had held |
| C．was holding | D．would hold |