en took the little key, and opened it, trembling, but could not at first see anything ________, because the windows were shut.

Peter was so excited ______ he received an invitation from his friend to visit Chongqing.[ ]

Could I ask you some personal questions —

It is the farm _____ we are going to pay a visit______ provides large quantities of green vegetables for the nearby town everyyear

It is almost five years ______ we saw each other last time.