________ we have enough evidence，we can't win the case.
| A．Once | B．As long as | C．Unless | D．Since |
By the end of last month, we had produced _____ as we did last year.
| A．as twice many cars | B．twice many as cars | C．twice as many cars | D．as many cars twice |
—When are you leaving for Beijing？
—Tomorrow morning. My train _____ at 10:00 am．
| A．is left | B．was leaving | C．leaves | D．has left |
Mr. Smith is _____ great fun and we had _____ great fun with him.
| A．a; 不填 | B．a; a | C．不填; a | D．不填; 不填 |
James is a famous clothing designer (设计者) whose style is similar to ______ of Joan Keats’s.
| A．what | B．it | C．that | D．the one |
She is the first person in her family to __________ this kind of social activities.
| A．come near to | B．go on with | C．keep up with | D．take part in |