They insisted that the sick child_______to the hospital at once!A.must be sent B.be sent还有虚拟语气是不是就是以should开头.

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• They insisted that the sick child_______to the hospital at once!A.must be sent B.be sent还有虚拟语气是不是就是以should开头.
• The wouded and the sick must be taken to--hospital at once 用the还是用a
• We insisted that the sick children (be sent) to hospital at once.为什么用be sent