He doesn’t know ________ they will plant trees on Saturday or not.
| A．weather | B．whether | C．if | D．that |
相关试题
Mother keeps telling her son not to get off until the bus .
| A．will stop | B．is going to stop | C．stopped | D．stops |
He doesn’t know ________ they will plant trees on Saturday or not.
| A．weather | B．whether | C．if | D．that |
Mother keeps telling her son not to get off until the bus .
| A．will stop | B．is going to stop | C．stopped | D．stops |
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