Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.
| A．the … / | B．the … the | C．/ … the | D．/ … / |
I don't think the experiment is ______ failure. At least we have gained ______ experience.
| A．a; an | B．a; / | C．/; an | D． /; / |
--- You look happy today. Is there anything good?
--- I’m very delighted ______ as one of the exchange students.
| A．to choose | B．to have been chosen |
| C．choosing | D．having been chosen |
This football player was accused of taking money for not scoring goals ______.
| A．by chance | B．on end | C．in turn | D．on purpose |
It is not how much money you will give us but that you are present at the ceremony ______ really matters.
| A．which | B．it | C．what | D．that |
--- How did you like the concert last night?
--- I enjoyed it very much, but the dancers ______ a better job.
| A．could have done | B．couldn’t have done | C．could do | D．had done |