16. I returned home with some roses and only then __________ find my favorite vase missing.
| A．I did | B．did I | C．do I | D．I do |
________ you’ve got a chance,you might as well make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |
—When on earth will the bus come?We have been waiting here for what seemed long ages.
—Look,________.
| A．there comes the bus | B．there is the bus coming |
| C．there the bus comes | D．there is coming the bus |
It’s high time we ________ effective ________to improve your working conditions.
| A．take;means | B．made;measures | C．took;measures | D．do;actions |
It’s really very dangerous.One more step,________the baby will fall into the well.
| A．or | B．so | C．and | D．but |
Let me have a rest,________?
| A．do I | B．don’t I | C．shall I | D．may I |