Having been attacked by terrorists, _____.
| A．doctors came to their rescue |
| B．the tall building collapsed |
| C．an emergency measure was taken |
| D．warnings were given to tourists |
—Hello, this is Tom speaking.
—Tom? Oh, sorry, I ______ your voice.
| A．didn’t realize | B．don’t realize | C．don’t recognize | D．didn’t recognize |
___________ get a better score, she has been studying hard all day.
| A．So as to | B．In order to | C．So that | D．In order that |
It is the first time that I ______________ such a beautiful scene.
| A．saw | B．see | C．had seen | D．have seen |
Do you know that I have trouble __________ the work?
| A．to do | B．doing | C．do | D．done |
Mr. White ______ from heart trouble, and he takes some medicine with him.
| A．suffered | B．has suffered |
| C．was suffering | D．has been suffered |