Many students believe the choice of their courses and universities should ______ their own interests.
| A．be based on | B．based on | C．be basing on | D．base on |
Years later, I began ______ what he told me right.
| A．knowing | B．to know |
| C．recognize | D．to recognize |
It’s no use ______ with him ______ this matter.
| A．arguing; for | B．arguing; over |
| C．to argue; over | D．to argue; about |
______ the distance was too long and the time was short, we decided to fly there instead.
| A．Discovering | B．To discover |
| C．To have discovered | D．Discovered |
—What’s the matter with you, Tom?
—______ the ladder, one of arms has been broken.
| A．Climbing | B．While climbing |
| C．To climb | D．While I was climbing |
______ the illness pneumonia, Jackson couldn’t go on teaching.
| A．As a result | B．As the result |
| C．As result of | D．As a result of |