It is believed _______ he has gone to Shanghai. The problem is ________ we can’t get in touch with him.
| A．when; that | B．that; that | C．that; whether | D．不填；不填 |
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It is believed _______ he has gone to Shanghai. The problem is ________ we can’t get in touch with him.
| A．when; that | B．that; that | C．that; whether | D．不填；不填 |
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