In buses, all of us _________ thieves.
| A．keep an eye out for | B．are keep an eye out for |
| C．are kept an out for | D．keep eye out for |
The manager suggested an earlier date ____________ the meeting.
| A．on | B．for | C．about | D．with |
I _____ it as a basic principle of the company that suppliers of raw materials should be given a fair price for their products.
| A．make | B．look | C．take | D．think |
Small sailboats can easily turn over in the water ______ they are not managed carefully.
| A．though | B．before | C．until | D．if |
. Leaves are found on all kinds of trees, but they differ greatly ________ size and shape.
| A．on | B．from | C．by | D．in |
Reality is not the way you wish things to be, nor the way they appear to be, ___ the way they actually are.
| A．as | B．or | C．but | D．and |