－ I came all the way to inform you of the time and place of the meeting.
－You could have __________ yourself the trouble by calling me.
| A．shared | B．spared | C．cost | D．removed |
His laziness ___________it hard for him to study well.
| A．makes | B．gets | C．has | D．brings |
______________ is quite obvious that there is no water on the Mars.
| A．There | B．It | C．That | D．This |
To qualify yourself for this kind of new job, I recommend that you ________ some on-line course.
| A．to take | B．taking | C．take | D．would take |
Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
I have never imagined _______ such a good hotel in this town.
| A．there having | B．there’s being | C．there being | D．there have |