单项选择题
They（）so that we wouldn't recognize them.
A.disguise B.disguised C.were disguising D.were disguised
单项选择题 —Glad to see you again. How was your trip? —（）
单项选择题 Once more I am in Boston,（）I have not been for ten years.
单项选择题 —Excuse me, could you tell me which bus goes to the Fine Arts Museum? —（）
