摘要：19．The men will have to wait all day the doctor works faster． A．if B．unless C．before D．when
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The men will have to wait all day ________ the doctor works faster．
[ ]
A．if
B．unless
C．whether
D．that
The men will have to wait all day _____ the doctor works faster..
|
A．if |
B．unless |
C．whether |
D．that |
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The men will have to wait all day _____ the doctor works faster..
| A．if | B．unless | C．whether | D．that |