2.太阳和它的八颗行星被称为太阳系。(be called)

1.你了解宇宙吗？(know about)

4.我刚收到了朋友的来信。

I have       my friend.

3.他为英国广播公司工作过。

He        worked for the BBC.

2.我从来没有去过纽约。

I        to New York.

1.他们已经打扫过教室了吗？

       they        the classroom?

(   ) 6. —Have you finished your homework       ?

—Yes,I finished it a moment ago.

   A. just   B. yet   C. ever   D. never

(   ) 5. —Have you ever      to the Movie Theatre?

Yes,I        there with my friends last week.

   A. gone; go   B. been; went

   C.  gone; went

(   ) 4. —Have you returned the book to the library      ?

—Yes,I have        returned it.

   A. yet; yet   B. yet; already

   C.  already; already   D. already; yet

(   ) 3. —Is Jim in the office?

—No,he to the dining hall.

   A. goes   B. would go

   C. has gone   D. had gone