Rather than carry out the project by itself, the company planned to _________ with other potential cooperators.
| A．catch up | B．come up |
| C．keep up | D．team up |
--Honey，the basketball game is about to start. And could you bring me a bowl of ice cream？And...uh...a slice of pizza.
--________？
--No，that's all for now.
| A．What did you say |
| B．Anything else |
| C．Could I help |
| D．What can I do for you |
Rare species in the world, ______ by hundreds every year, must be jointly preserved by all countries, or humans will encounter ecological disaster in the near future.
| A．disappeared |
| B．disappearing |
| C．disappear |
| D．having disappeared |
It a Saturday afternoon in May ______ Margaret could arrange for me to meet her elder sister.
| A．was until；when |
| B．was until；that |
| C．was not until；when |
| D．was not until；that |
I failed in the examination last term and only then ____ the importance of studies.
| A．I realized |
| B．I had realized |
| C．had I realized |
| D．did I realize |
________ he had won the first prize, he felt very happy.
| A．Know |
| B．Known |
| C．Knowing |
| D．Being known |