–Are you going to Shanghai by bus?
--I am not sure. It’s cheap, but uncomfortable. I _____ take a train.
| A．may | B．must |
| C．can | D．should |
–Are you going to Shanghai by bus?
--I am not sure. It’s cheap, but uncomfortable. I _____ take a train.
| A．may | B．must |
| C．can | D．should |
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