__________ matters most in learning English is enough practice.
| A．What | B．Why |
| C．Where | D．Which |
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 |
_____it is raining, we had better take a taxi.
| A．For | B．As | C．Because of | D．When |