Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
Believing in people is the key to motivating people to ______ their potentials.
| A．have | B．hide | C．reach | D．limit |
When a person is absent-minded, he is likely to miss key information ______ on to them.
| A．passing | B．passed | C．having passed | D．been passed |
Brendan hurriedly got to the airport, only ______ the plane had taken off.
| A．to find | B．to finding | C．to be finding | D．to have found |
If you’re around people complaining others, ______ are that you will start to complain as well.
| A． reasons | B．attempts | C．chances | D．messages |
The look on Max’s face was ______ between puzzlement and anger.
| A．everything | B．nothing | C．something | D．anything |