The woman was about to open the door ____________ she heard a strange sound from inside.
| A．as | B．while | C．when | D．then |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
I think the doctor is able to care of _____ is the matter with your son .
| A．all | B．what | C．whatever | D．anything |
Let us not waste ______ time we have left .
| A．the little | B．little | C．a little | D．a little more |
Do you consider it any good _____ the truck again ?
| A．to repair | B．repairing | C．repaired | D．being repairing |
It's nearly seven o'clock . Jack _____ be here at any moment .
| A．must | B．need | C．should | D．can |