Is oxygen the only gas ________ helps fire burn?
| A．that | B．/ | C．what | D．it |
This is the very information _______ we can learn what is selling best in the market. .
| A．from which | B．that | C．which | D．from that |
All _____ can be done has already been done.
| A．/ | B．what | C．that | D．which |
The girl ______in red is a successful writer, who _______ Tom last month.
| A．dressed; got married with | B．dressing; married to |
| C．dressing; was married to | D．dressed; married |
Mr. Smith doesn’t believe that his daughter can work out the problem that easily,_____?
| A．does he | B．can she | C．doesn’t he | D．can’t she |
It is said that Tom hasn’t passed the driving test, but, ______ he is a little too young.
| A．above all | B．after all | C．at all | D．for all |