Question

Every boy and every girl ______ that each day and each hour brings ______ duty.

A．know；their

B．knows；their

C．knows；its

D．know；its

Answer 1

C

此题考查主谓一致。“every/each＋单数名词＋and＋every/each＋单数名词”作主语时，谓语动词用单数形式。