________ it is expected that students come to college with the ability to solve most problems in their study by themselves , this is not always the case.
| A．When | B．While | C．For | D．As |
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________ it is expected that students come to college with the ability to solve most problems in their study by themselves , this is not always the case.
| A．When | B．While | C．For | D．As |
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