oved aimlessly down the tree-lined street, not knowing ______she was heading.

They __________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.

Please don”t make a noise . — ____ . I”ll be as quiet as a mouse .

“Will you go skiing with me this winter vacation？” “It ______”

They look forward to _____ Harbin with us.