We could see that he was trying to _____ his own responsibility for the delay, instead of accepting his fault.
| A．run over | B．smooth over | C．pass off | D．turn down |
. ___ to nuclear radiation, even for a short time may produce variants（变异体）of genes in human bodies.
| A．Being exposed | B．Having exposed |
| C．Exposed | D．After being exposed |
Michael never dreamt of ____ for him to be sent abroad very soon.
| A．being a chance | B．there’s a chance |
| C．there to be a chance | D．there being a chance |
Once your business becomes international, ___ constantly will be part of your life.
| A．your fly | B．your flight | C．flight | D．flying |
I can hardly imagine such a little boy ___ across the Nile.
| A．swim | B．to swim | C．swimming | D．to have swum |
Jack, have you ____ your mid-term examination?
| A．finished | B．passed through | C．got through | D．succeeded to pass |