The teacher speaks very loudly _________ all the students can hear her.
| A．so that | B．because |
| C．since | D．when |
I know you are shorter than your brothers, but you run _________
| A．more faster | B．fastest |
| C．more fast | D．fast |
_________ you told me. I had heard nothing of what happened.
| A．Until | B．Though |
| C．When | D．If |
－I'm going to spend my summer holiday in Hawaii.
－What a lucky boy! _________ And don't forget to send me a postcard.
| A．That sounds good. | B．Have a good time! |
| C．Good luck! | D．Can I go with you? |
Tom, would you please _________ the box? It’s for your sister.
| A．not open | B．don't open |
| C．not to open | D．to not open |