Something must be done to stop cutting down trees. ________ all the trees are cut down, the valuable soil will be washed away by the heavy rain.
—Which of the three optional courses did you like best,Joe?—To tell you the truth,I didn't like ________ of them.
It was hard for him to learn English in a family, in which ________ of the parents spoke the language.
—John,when shall we meet again,Thursday or Friday?—________.I'll be off to London then.(2012·重庆)
He had lost his temper and his health in the war and never found ________ of them again.(2010·重庆)
—How do you find your new classmates?—Most of them are kind, but ________ is so good to me as Bruce.