单项选择题
A．They are virtually impossible to enforce. B．Neither is applicable to the woman’s case. C．Both of them have been subject to criticism. D．Their requirements may be difficult to meet.
A．He can’t afford to go traveling yet. B．His trip to Hawaii was not enjoyable. C．He usually checks his brakes before a trip D．His trip to Hawaii has used up all his money.
A．Whether the security checks were really necessary. B．How to cope with the huge crowds of visitors to the municipal building C．Whether the security checks would create long queues at peak hours. D．How to train the newly recruited security guards.