–Dad, _____ we wait until the light becomes green?
--Yes, we ______ . That’s the traffic rule.
| A．need, can | B．shall, must |
| C．must, have to | D．can, need |
–Dad, _____ we wait until the light becomes green?
--Yes, we ______ . That’s the traffic rule.
| A．need, can | B．shall, must |
| C．must, have to | D．can, need |
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