Health experts in many countries still _________ their ideas about the relationships between our food and our health.
| A．have tested | B．tested | C．are testing | D．test |
It would be a good idea to use a plastic bottle，__________ cut off, as a container to grow young plants in.
| A．which |
| B．whose top |
| C．the top of that |
| D．with its top |
I don't like my present work very much, but I care about its high __________.
| A．salary | B．force |
| C．energy | D．strength |
The new tax policy only affects people on yearly incomes over 120000 yuan __________ the very rich.
| A．by the way | B．as a result |
| C．in other words | D．as a manner of |
With some effective measures __________，the traffic condition of the city has been further improved.
| A．adopting | B．adopted |
| C．to adopt | D．being adopted |
Environmentalists urged that more effective measures __________ by the government to reduce the pollution.
| A．were taken | B．would adopt |
| C．be adopted | D．should take |