So far, several ships have been reported missing the coast of Bermuda Island.
| A．off | B．along | C．on | D．around |
Team leaders must ensure that all members ______ their natural desire to avoid the embarrassment associated with making mistakes.
| A．get over | B．look over | C．take over | D．come over |
With inspiration from other food cultures, American food culture can take a ______ for the better.
| A．share | B．chance | C．turn | D．lead |
Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
| A．difference | B．comparison | C．connection | D．barrier |
In much of the animal world, night is the time ______ for sleep—pure and simple.
| A．set aside | B．set down | C．set off | D．set up |
Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
| A．carry on | B．feed on | C．put on | D．focus on |