Mr Liu is ____ unusual teacher. He has written _____ useful book for his students.

Where did you see the sponsor, Madame?— It was in the supermarket _______I was doing some shopping with my husband [ ]

How did you think of the job he did last week ?—–Well done. ______.

well-known to us all that knowledgeis __ treasure, but practice is ___ key to it

Thepoliceman’s_________trafficdirectionsmadeallthedriversquite ___________.