Remember that you won't be able to cancel the contract ____you've signed.
| A．before | B．until | C．once | D．though |
She is a kindhearted woman and often has________mercy________people who are in trouble.
| A．a；on | B．/；on |
| C．a；to | D．/；to |
Little Johnny felt the bag，curious to know what it____________.
| A．collected | B．contained |
| C．loaded | D．saved |
David threatened ________his neighbor to the police if the damages were not paid .
| A．to be reported | B．reporting | C．to report | D．having reported |
The government insists that the dam will not do any ________to the environment .
| A．reserve | B．application | C．bargain | D．harm |
I would ________it if you would let me deal with this by myself .
| A．appreciate | B．inspect | C．protecct | D．replace |