A survey of opinions of experts _______that three hours of outdoor exercise a week _______good for one’s health.
| A．show; are | B．shows; is |
| C．show; is | D．shows; are |
All her energies are ______upon children and she seems to have little time for anything else.
| A．guided | B．aimed | C．directed | D．focused |
At times the balance in nature is ______，resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
Generous public funding of basic science would______a good many benefits for the country's health，wealth and security.
| A．result from | B．lead to | C．lie in | D．settle down |
_____，they set out to break the record for crosschannel swimming.
| A．Well equipped | B．Well equipping | C．Well equips | D．To equip |
There is still much to discuss.We shall，______，return to this item at our next meeting.
| A．therefore | B．however | C．otherwise | D．briefly |