It was ______ back home after the experiment.
| A． not until midnight did he go | B． until midnight that he didn’t go |
| C． not until midnight that he went | D． until midnight when he didn’t go |
There .
| A．come they |
| B．they come |
| C．they are come |
| D．they will come |
the plane.
| A．Flew down |
| B．Down flew |
| C．Down was flying |
| D．Down fly |
--- 1 don’t think I can walk any further.
--- . Let’s stop here for a rest.
| A．Neither can I. |
| B．Neither do I. |
| C．I didn’t think so. |
| D．I think so. |
got into the room the telephone rang．
| A．He hardly; then |
| B．Hardly had he; when |
| C．He had not; than |
| D．Not had he; when |
Not until all the fish died in the river how serious the pollution was.
| A．did the villagers realize |
| B．the villagers realized |
| C．the villagers did realize |
| D．didn’t the villagers realize |