Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power．
| A．since | B．after | C．unless | D．before |
We at the airport; otherwise we would have arrived home by lunch time.
| A．had delayed | B．were delayed | C．had been delayed | D．have delayed |
There is no need for you to go on a diet; you are only slightly overweight ______ your height.
| A．in case of | B．in relation to | C．in return for | D．in response to |
China needs to strike a balance between maintaining a ______ fast and stable development and economic structural adjustment.
| A．relatively | B．seemingly | C．approximately | D．environmentally |
The preschool children who watch TV programs with violent scenes are more likely to have sleep problems than those who watched programs for the age.
| A．accurate | B．fantastic | C．delicate | D．appropriate |
We need a (n) _______ team leader who can really motivate the members to work harder.
| A．considerable | B．cautious | C．dynamic | D．conventional |