未知题型
结构图的主要成分有()。
A,B,C,D
未知题型 It's wet on the ground. It ( )yesterday evening.must beB: should beC: must have rainedD: should have rained
未知题型 系统维护的类型有()。
未知题型 -What does this word mean, Joe? -( ).Sorry, I don't know, eitherB: Joe is a boy's nameC: Of course, I'm JoeD: This word means Joe
