a. We need __________ dictionaries.
b. I think __________ mistakes should be avoided.
A. some such, all such B. such some, such all
C. some such, such all D. such some ，all such
分析：此题应选A。按英语习惯，such与no, any, some, all, few,
many, each, every, several, other, another, one, two等连用，通常应置于其后。如：
正：There are no such things now.
误：There are such no things now.
正：I have met many such people.
误：I have met such many people.
正：One such dictionary is enough for me.
误：Such one dictionary is enough for me.
正：Every such possibity must be considered.
误：Such every possibity must be considered.
正：I hope never to meet another such accident.
误：I hope never to meet such another accident.
但是such要放在 a, an 之前。如：
正：I have never heard such a thing.
误：I have never heard a such thing.