--- Do you regret paying ten dollars for the book?
---No．I would rather pay ___ that price.
| A．three times so high as | B．so three times high as |
| C．as much three high as | D．three times as high as |
The real reason why prices ____ , and still are, too high is complex, and no short discussion can satisfactorily explain this problem.
| A．were | B．will be |
| C．have been | D．had been |
The whole team _____ Cristiano Ronaldo, and he seldom lets them down.
| A．wait on | B．focus on |
| C．count on | D．call on |
It might have saved me some trouble ______ the schedule.
| A．did I know | B．have I known |
| C．do I know | D．had I known |
The university started some new language programs to _____ the country’s Silk Road Economic Belt.
| A．apply to | B．cater for |
| C．appeal to | D．hunt for |
It is so cold that you can't go outsidefully covered in thick clothes.
| A． | if | B． | unless | C． | once | D． | when |