单项选择题
Having a good command of English is（）an easy thing.
A.by all meansB.by any meansC.by every meansD.by no means
单项选择题 （）your help, I could not have finished my work so early.
单项选择题 The manager of our company asked me if was possible for me to（）the marketing plan within a week.
单项选择题 Not being able to speak English,they felt rather（）in the USA.
