Use your head, ________ you’ll work out the problem.
| A．or | B．and | C．so | D．for |
Though ________ experience, he soon got a higher pay by working hard.
| A．lacked | B．lacking of | C．lacking | D．lacked in |
Come and see me whenever _____.
| A．you are convenient | B．you will be convenient |
| C．it is convenient for you | D．it will be convenient for you |
They covered the body of the little hero with a flag, ____his face to the public.
A to expose B exposing C exposed D expose
To our surprise, the man looking very rude____ his son very carefully.
| A．take care | B．look after | C．attended | D．All of the above |
The theory he ____ about black hole isn’t understood by most of people.
A .put up B put down C put off D put forward