【2015·安徽】______ scientists have learned a lot about the universe, there is much we still don't know.
| A．Once | B．Since | C．Though | D．Unless |
相关试题
The soldier was ____ of running away when the enemy attacked.
| A．scolded | B．charged | C．accused | D．punished |
Not only ____ 
interested in football but also ____ beginning to show an interest in it.
| A．the teacher himself is ; all his students are |
| B．the teacher himself is ; are all his students |
| C．is the teacher himself; are all his students |
| D．is the teacher himself; all his students are |
The girl is badly injured. You’d better _____ first aid to her before taking her to hospital.
| A．make | B．do | C．take | D．afford |
--It’s a good idea. But who is going to ____ the plan?
---I think Tom and Greg will.
| A．set aside | B．carry out | C．take in | D．get through |
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