单项选择题
The committee has been ()my letters for three months.
A.going onB.working onC.studying forD.sitting on
单项选择题 The first few months of the year I had()the ringing of the telephone.
单项选择题 There is ()here who won ’t help you when you find yourself in difficulty.
单项选择题 You must ()the fact that you are no longer as strong as you were.