＿＿＿! You should take this chance to attend it.
| A．How important conference is it |
| B．How an important conference it is |
| C．What an important conference is it |
| D．What an important conference it is |
With so many things mixed up it’s hard to _______ what’s that.
| A．give out | B．turn out | C．make out | D．take out |
Stand up _______ you fell down, and I’m sure you’ll succeed in time.
| A．until | B．where | C．before | D．which |
Scientists across the world agree that this is an invention of _______ great significance, _______ invention that will greatly change human life.
| A．a; the | B．a; an | C．/ ; the | D．/ ; an |
--- Tom, would you do me a favor? I’m in a mess.
--- _______. I’m just answering a call.
| A．Of course | B．Not at all | C．With pleasure | D．Wait a minute, please |
Why were you driving so fast? Yousomebody.
| A．might hurt | B．might have hurt | C．would hurt | D．must have hurt |