he boys followed the marks that they ________, until finally they found their way back to the campsite.
| A．left | B．have left |
| C．had left | D．have been left |
26．All passengers _________ to Shanxi must change trains at the next stop.
| A．not go | B．aren’t going | C．don’t go | D．not going |
25．---It was careless of you to have left your clothes outside all night.
---My God! __________.
| A．So did I | B．So I did | C．So were you | D．So did you |
24．He rose to speak, _________ to with great attention.
| A．and was listened | B．and listened | C．listening | D．to be listened |
23．We can work wonders so long as we try our best, that is, we can make ____________.
| A．impossible possible | B．the impossible possible |
| C．possible impossible | D．the possible impossible |
22．How close parents are to their children ___________a great effect on the characters of the children.
| A．have | B．to have | C．having | D．Has |