After the equipment was introduced; they produced_______ machines this year as the year before.
| A．as twice many | B．as many twice |
| C．twice as many | D．twice many as |
There is no simple answer，________ is often the case in science.
| A．as | B．that |
| C．when | D．where |
John invited about 40 people to his wedding，most of________are family members.
| A．them | B．that |
| C．which | D．whom |
We have launched another manmade satellite, ________is announced in today’s newspaper.
| A．that | B．which |
| C．who | D．what |
Many countries are now setting up national parks________animals and plants can be protected.
| A．when | B．which |
| C．whose | D．where |
When I arrived，Bryan took me to see the house________I would be staying.
| A．what | B．when |
| C．where | D．which |