I failed in the final examination last term and only then _____ the importance of study.
| A．I realized |
| B．had I realized |
| C．I had realized |
| D．did I realized |
They worked hard_____they finished their work ahead of time.
| A．so | B．so that | C．such that | D．so as to |
His speech made_____deep impression on the audience that they could hardly forget it.
| A．such a | B．so a | C．so | D．such |
_____everybody is here, Let’s begin our meeting.
| A．Now that | B．Because | C．For | D．When |
He must have passed this way, _____here are his footprints.
| A．since | B．because of | C．now that | D．for |
“Why can’t you do it now?” “_____I’m too busy.”
| A．Since | B．As | C．Because | D．For |