Some aspects of a pilot’s job ___ be boring, and pilots often ___work at inconvenient hours.
| A．can; have to |
| B．may; can |
| C．have to; may |
| D．ought to; must |
For miles around me there is nothing but a desert, without a single plant of tree .
| A．in sight | B． on the earth | C．at a distance | D．in a place |
It was easier to move about the fringe of the crowd.
| A．at | B．in | C．on | D．to |
So far, several ships have been reported missing the coast of Bermuda Island.
| A．off | B．along | C．on | D．around |
the trees in that thick forest are so dose together that there is hardly any room to move them.
| A．between | B．in | C．among | D．across |
The speech by the mayor of Shanghai before the final voting for Expo 2010 is strongly impressed my memory.
| A．to | B．over | C．by | D．on |