超星 - Test of ellipsis - 查题吧

单选题

The missile is designed in such a way that once ______ nothing can be done to retrieve it.

A. fired
B. being fired
C. they fired
D. having fired

单选题

We have done things we ought not to have done and _______ undone things we ought to have done.

A. leaving
B. will have
C. left
D. leave

单选题

What a good listener is able to do is to process what he hears on the basis of the context ______.

A. it occurring in
B. occurred in it
C. occurring in it
D. it occurs in

单选题

When ______ through a telescope, the sun appears darker near the edge.

A. seen
B. see
C. to see
D. seeing

单选题

While _______ the sun, the satellite has sent more than four billion bits of information back to earth.

A. orbited
B. being orbited
C. having orbited
D. orbiting

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