Although she has a lot of problems, she managed to remain .
| A．optimistic | B．cautious | C．concert | D．anxious |
Our world ___________ to live in without so much pollution．
| A．would be the best one | B．will be the better one |
| C．will be the best one | D．would be a far better one |
________, I think, and the problem could be settled．
| A．A bit more effort | B．So long as you keep up your spirits |
| C．If you doubt your efforts | D．Making great efforts |
--- Can I have a talk with you at about 5 this afternoon, Mr．Smith?
--- All right, I ______ to my office from a conference then．I will be waiting for you there．
| A．have come back | B．will come back |
| C．will have come back | D．will be coming back |
_____ global financial crisis of 2009 became _____ concern for people all over the world．
| A．The; the | B．The; a | C．不填；不填 | D．A ； the |
---Remember the first time we met, Mary?
---Sure．You ______ in the supermarket．
| A．had shopped | B．have shopped | C．were shopping | D．shopped |