摘要：22．The road is covered with snow．I can't understand they insist on going by motor-bike． A．when B．why C．whether D．how
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The road is covered with snow．I can't understand they insist on going by motor-bike．
A．when B．why C．whether D．how
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The road is covered with snow．I can't understand ________ they insist on going by motorbike．
[ ]
A．why
B．whether
C．when
D．how
The road is covered with snow．I can't understand ________ they insist on going by motorbike．
[ ]
A．why
B．whether
C．when
D．how