问题

It’s four o’clock in the afternoon. The boys__ in the pool.
A:is swiming
B:are swiming
C:areswimming
D:is swimming
B:are swiming
C:areswimming
D:is swimming
正确答案是:
同类题型
dating back perhaps as far as the SouthernDynasty, _________ its new meaning last September.
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29 Was it at half past five when we werestill sound asleephe got up