Hawking， one of _____most famous scientists， passed away in March．（ ）
A．aB．anC．theD．不填
pale you look! Are you feeling all right？
I'm not feeling well．I've got toothache．（ ）
A．How aB．HowC．What aD．What
If the customer rings up for me again，please the call to the sales department．（ ）
A．run throughB．look through
C．go throughD．put through
To make your DIY work perfect，you'd better not start you get all the tools ready．（ ）
A．whenB．whileC．beforeD．after
Oh， dear! A power（电源） cut!
Sorry， I didn't know you _________the washing machine．（ ）
A．usedB．are usingC．to useD．were using
A good student connects what he reads what he sees around him．（ ）
A．forB．withC．inD．on