--- I have trouble ______ my new computer.

--- Don’t worry. I will show you ______.

A．to use, how to use

B．to use, what to use

C．using, what to use it

D．using, how to use it

My sister advised me that I _______ accept the job.     [      ]

A. would                        

B. might    

C. could                        

D. should