7．Schools across China are expected to hire 50,000 college graduates this year as short-term teachers __________increase job opportunities.
| A．help | B．to have helped | C．to help | D．having helped |
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7．Schools across China are expected to hire 50,000 college graduates this year as short-term teachers __________increase job opportunities.
| A．help | B．to have helped | C．to help | D．having helped |
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