In Beijing volunteers are making use of every minute to ________ their foreign 
languages because language volunteers must pass a written test and an interview.
| A．polish up | B．take up | C．put up | D．make up |
推荐套卷
In Beijing volunteers are making use of every minute to ________ their foreign languages because language volunteers must pass a written test and an interview.
| A．polish up | B．take up | C．put up | D．make up |
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