Hurry up!The train_.You know it_at 9:00 a.m.A.leaves;leaves B.is leaving;leaves C.leaves;is leaving

问题描述:

Hurry up!The train_.You know it_at 9:00 a.m.A.leaves;leaves B.is leaving;leaves C.leaves;is leaving

B
前一空现在进行时表正在发生的事态;
后一空一般现在时表常态(这趟火车每次都是早九点发车).