—Did you find the missing couple in the mountain yesterday?
—No, but we ________ to get in touch with them ever since.
| A．have been trying | B．have tried | C．are trying | D．were trying |
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—Did you find the missing couple in the mountain yesterday?—No, but we ________ to get in touch with them ever since.
| A．have been trying | B．have tried | C．are trying | D．were trying |
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