—Is there anything wrong with you, Jake? You look so pale．
—I feel very tired．I _____on this boring paper every day so far this month．
| A．work | B．have been working | C．had been working | D．am working |
相关试题
The college education system should be reformed ______ it can follow the pace of the
economic development. 
| A．so long as | B．so that | C．only if | D．even though |
. Researchers now have some proofs ______ reading the Roman alphabets and Chinese
characters uses different parts of brain.
| A．where | B．when | C．which | D．that |
. He _____ his potential had it not been for his desire to meet new challenges.
| A．would never have realized | B．would never realize |
| C．never realized | D．had never realized |
_____ the lack of workforce in many industries, workers are now commanding higher salaries than they used to be.
| A．Regardless of | B．Due to | C．In case of | D．According to |
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