You can’t complain about being left out ______you don’t make any effort to share your joys and sorrows with others.
| A．once | B．unless | C．when | D．though |
________ from the top of the tower, the south foot of the mountain is a sea of trees.(2010·陕西)
| A．Seen | B．Seeing |
| C．Having seen | D．To see |
The professor had no sooner finished his speech ________ the students started cheering.
| A．since | B．when | C．than | D．as |
________into English, the sentence was found to have an entirely different word order.(2011·天津)
| A．Translating | B．Translated |
| C．To translate | D．Having translated |
—Did you have a chat with Tom?
—No, I was trying to ________ an opportunity to do so, but I couldn't.
| A．hold | B．ask | C．seize | D．make |
．The policeman caught the thief by ________ arm.
| A．a | B．an | C．/ | D．the |