Tired, Jim was fast asleep with his back_____a big tree.
| A．in | B．below | C．beside | D．against |
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 |
No decision about any future plan until we have done a thorough research of the teachers’ preference.
| A．has been made | B．is made | C．is being made | D．will be made |