You haven't eaten all day． You___be very hungry．（ ）
A．couldn't beB．can't
C．mightD．must
Our teacher often advises us the habit of making notes while reading．（ ）
A．to developB．develop
C．to developingD．developing
Steve Jobs was full of always coming up with new ideas which led to great changes in society．（ ）
A．instructionB．invitation
C．introductionD．invention
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