单项选择题
By（）your work environment and personal practices, you may be able to reduce fatigue and discomfort.
A．adapt B．having adapted C．adapting D．being adapted
单项选择题 The commercial purpose of a trade mark is（）the goods or services of a company from those of competitors.
单项选择题 Were it not for your help, I（）in trouble now.
单项选择题 If you try to pass（）the problems, it would be impossible for you to make any progress in this field.
