单项选择题

A．When crop failure caused depression.
B．When the autumn harvest had just been completed.
C．When the wheat prices became increasingly high.
D．As soon as the Winnipeg Grain Exchange demanded payment:
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单项选择题
A．Where the oil spill occurred.B．What caused the oil spill.C．How the oil spill was handled.D．The number of volunteers who came to help.
A．Where the oil spill occurred.
B．What caused the oil spill.
C．How the oil spill was handled.
D．The number of volunteers who came to help.
单项选择题
A．The runner enters the stadium with the torch.B．Teams of different countries put on a wonderful display.C．The host country marches in last.D．There must be both men and women in all teams.
A．The runner enters the stadium with the torch.
B．Teams of different countries put on a wonderful display.
C．The host country marches in last.
D．There must be both men and women in all teams.
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