----I have got a headache.
---- No wonder. You ________ in front of that computer too long.
| A．work | B．are working | C．worked | D．have been working |
相关试题
Mary went to the box office at lunch time, but all the tickets____ out.
A． have sold |
B．would sell | C．was selling | D．had sold |
For breakfast, he only drinks juice from fresh fruit____ on his own farm.
| A．grown | B．being grown | C．to be grown | D．to grow |
Leaves are found on all kinds of trees,but they differ greatly_____ size and shape.
| A．on | B．from | C．in | D．by |
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