题目列表(包括答案和解析)
13．Many medical scientists are racing__________time to find a cure for H1N1 as soon as possible.
A．on B．against C．for D．In
Many medical scientists are racing time to find a cure for H1N1 as soon as possible.
A．on B．against C．for D．in
13．Many medical scientists are racing__________time to find a cure for H1N1 as soon as possible.
| A．on | B．against | C．for | D．In |
Many medical scientists are racing time to find a cure for H1N1 as soon as possible.
A．on B．against C．for D．in
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