Keep your minds ________ to different ideas, or you will not be successful.
| A．opening | B．to open | C．open | D．opened |
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 |
He used to be very shy but he has grown it now.
| A．without | B．over | C．away | D．out of |
So far, several ships have been reported missing the coast of Bermuda Island.
| A．off | B．along | C．on | D．around |
They always lay a large supply of tinned food in winter in case they are snowed up.
| A．out | B．off | C．in | D．with |
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 |