消息是被报道出来的,it 是后面that引导的从句,意思是这件事上礼拜被报导出来了。 天津雾霾引发许多问题,这一事件上星期被报导了。 上面说了,it指的就是that 后面那一串:the haze in Tianjin caused many problems天津雾霾引发许多问题 it 是形式主语,因为主语the haze in Tianjin caused many pro...
(A)1. It____ 5 years since we knew each other. A is B had been C will be D was ( A )2. she _____ sad since you went away. A has been B is C was D had been (D)3.I ____ him for two months. A go...