___ help the people in the snowstorm in the south made him worried．
| A．Not known how to | B．Unknown what to do to |
| C．His knowing not how to | D．His not knowing how to |
We are planning to _______ a party for our grandparents to celebrate their fiftieth anniversary of marriage.
| A．put | B．throw | C．make | D．get |
Have you considered how weak humans are ____ a volcano, hurricane or earthquake?
| A．comparing with | B．compared with |
| C．to compare with | D．having been compared with |
- Jerry, sorry to have kept you wait.
- It doesn’t matter, but I ________ you ________ later than me.
| A．didn’t think, would be | B．am thinking, will be |
| C．thought, had been | D．never thought, would be |
______rise in carbon dioxide is causing _______ steady increase in global warming.
| A．The; a | B．不填; a | C．The;不填 | D．A；the |
-- So, you didn`t take his advice?
--No. his advice, I a silly mistake.
| A．Were I to take; shouldn`t have made |
| B．If I had taken; would make |
| C．Had I taken; wouldn`t have made |
| D．Have I taken; won`t have made |