Every means _____ prevent the water from _____.
| A．are used to; polluting | B．will be used to; polluting |
| C．is used to; polluted | D．is used to; being polluted |
Everyone has arrived at eight and ＿＿＿＿.
| A．then does the meeting begin |
| B．then begins the meeting |
| C．begins the meeting then |
| D．does the meeting begin then |
—— My mother does a lot of housework before going to work,but she has never been late.
—— ＿＿＿＿＿.
| A．So does my mother | B．Neither does my mother |
| C．Nor has my mother | D．So it is with my mother |
They went into a small house but ＿＿＿.
| A．no persons did they find |
| B．not a person found they |
| C．not a person did they find |
| D．not a person they found |
Between the two mounts＿＿＿and they decide to build a ropeway(索道).
| A．lies a very deep valley |
| B．does a very deep valley lie |
| C．a very deep valley lies |
| D．a very deep valley lays |
＿＿can you find out how many chickens there are!
| A．Counting them |
| B．By counting them |
| C．Only by counting them |
| D．Only have you counted them |