判断下列各句中用括号括起来的代词照应是否错误，错的请改正1）.Whentheshipstarted,(it)wasshaking.2).Failureisthemotherofsuccess,and(it)istrue.3).(That)'smyopinion:youshouldstudy(it).4).Youshouldkeepcalm

　　判断下列各句中用括号括起来的代词照应是否错误，错的请改正

　　1）.Whentheshipstarted,(it)wasshaking.

　　2).Failureisthemotherofsuccess,and(it)istrue.

　　3).(That)'smyopinion:youshouldstudy(it).

　　4).Youshouldkeepcalmwhen(we)'reindanger.

　　5).Belike(that).Openyourmouthanddrink(it).

　　6).TheweatherofShenZhenisbetterthan(this)ofGuangzhou.

　　7).ThefruitsofShenZhenarebetterthan(these)ofGuangzhou.