Every minute is made full ______ of ______ our lessons.
| A．use; to study | B．use; studying | C．useful; studying | D．to use; study |
So long as we study with a strong will，we can answer the question__________hard it is.
| A．no matter what | B．how |
| C．whatever | D．however |
I was so familiar with her that I recognized her voice__________I picked up the phone.
| A．the moment | B．after |
| C．before | D．while |
It is almost five years__________ we saw each other last time.
| A．before | B．since | C．after | D．when |
There were dirty marks on her trousers __________she had wiped her hands.
| A．where | B．which | C．when | D．that |
The shop doesn’t open__________11 a.m.
| A．for | B．or | C．but | D．until |