（）不是目前国家开放大学设有的学习层次。

It’s also essential that we can not（）any marks mixed or damage to the cargo．

（） is meant to provide facility for customer s need or inquiry and arrange it.

（）means to provide facility for customer’s need or inquiry and arrange it.

It’s（）to stow optional cargo in the lower hold．You’d better give it block stowage in the tweendecks，then it can be easily discharged either at Shanghai，or Dalian or Tianjin.

国家开放大学学生工作处是（）。

It’s getting dark. Please ________ the cargo lights.

6． It s getting dark，please _________ the light．

Bob: What are you reading, Tom?　　Tom:It’s this week’s New Scientist, why?　　Bob:I was just wondering—______, but I’ve never actually read it myself. Is it aimed at real scientists or can ordinary people like me understand it?

Q3: Do you think it’s better for staff to receive written or oral feedback on their performance? (Why?/Why not?)

It is customary in shipping practice to quote freight rates（）weight or measurement,ship’s option.

By saying “While it’s true that ..., be they scientific or artistic” (Lines 1-3, Para.5), the author means that _____.