it's nto as bad as the comprehensive problems, but a little harder than the concept checkers, try their sample practice exam, its around the same level difficulty.
以下是引用davehan在2008-12-27 15:05:00的发言： it's nto as bad as the comprehensive problems, but a little harder than the concept checkers, try their sample practice exam, its around the same level difficulty.
发表于 2008-12-27 00:18
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