John waited at the bus-stop for nearly half an hour _____ the bus finally arrived .
| A．when | B．as | C．before | D．while |
Oh, Tom your face is very dirty.Look at yourself ___ the mirror.
| A．on | B．at | C．in | D．under |
Madame Curie and her husband continued to work __ all the discomforts.
| A．in spite | B．in spite of | C．in the spite of | D．on spite of |
Not only he but also you __ wrong.
| A．is | B．be | C．are | D．am |
This writer’s books are devoted ___ children.
| A．in | B．to | C．on | D．about |
No matter what happens, you should stick ___ your word.
| A．in | B．to | C．on | D．into |