(2012年重庆联合诊断性考试)It is rather difficult to make friends with him，but his friendship，________，is more true than any other's.
| A．once gained |
| B．when to gain |
| C．after gaining |
| D．while gaining |
相关试题
An awful accident_____，however，occur the other day.
| A．does | B．did | C．has to | D．had to |
Greenland， _____ island in the world，covers over two million square kilometers.
| A．it is the largest | B．that is the largest | C．is the largest | D．the largest |
_____， he often forgot to turn off the lights.
| A．Even better | B．Strange | C．However | D．Fortunately |
I
t was not until she had arrived home_______ her appointment with the doctor
| A．did she remember | B．that she remembered |
| C．when she remembered | D．had she remembered |
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