大肠杆菌、玉米、噬菌体、酵母菌都具有的糖是[ ]

A．纤维素    

B．淀粉  

C．糖原    

D．脱氧核糖

—Do you have to hold our English party in the classroom?

—Well. I don’t know ______if not there.

A．what can we do it

B．when can we do it

C．where can we do it

D．where we can do it