—Did you find the missing couple in the mountain yesterday?
—No, but we ______ to get in touch with them ever since.
| A．had tried | B．have tried | C．have been trying | D．had been trying |
相关试题
Do you know the difficulty he had___________his family ?
| A．to support | B．supporting | C．supported | D．being supported |
They failed to realize the use_____________the information.
| A．we made of | B．which we made | C．for our making | D．for us to use |
Listen ! The matter ___________has somethin
g to do with all of us.
| A．to discuss | B．to be discussed |
| C．being discussed | D．having b een discussed |
_______-after his death that he was recognized as a great composer.
| A．It was not until | B．Until | C．It was until | D．Not until |
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