Pleasant music is often played classes to make students refreshed and relaxed for a while.
| A．between | B．among | C．over | D．after |
You must keep us ______ of how things are going here.
| A．informing | B．informed | C．inform | D．to inform |
_______ by keeping down costs will Power Data hold its advantage over other companies.
| A．Only | B．Just | C．Still | D．Yet |
--- I didn’t invite him to the party but he came anyway and got completely drunk.
--- _______ he hadn’t come! The party could have been a success.
| A．How come | B．Only if | C．What if | D．If only |
--- How can I repair it?
--- Well, look at the _________.
| A．explanations | B．expressions | C．instructions | D．introductions |
He _____ some safety measures at the meeting for the 2010 Shanghai Expo.
| A．put forward | B．put up | C．put down | D．put off |