问题补充:
单选题Whenhesawallhisbooks_____hereandthereonthefloor,heknewthatsomethingterrible_____.A.lying; must have happenedB.lie; must happenC.lay; might have happenedD.had lain; could have happen
答案:
A
时间:2020-10-03 02:58:08
单选题Whenhesawallhisbooks_____hereandthereonthefloor,heknewthatsomethingterrible_____.A.lying; must have happenedB.lie; must happenC.lay; might have happenedD.had lain; could have happen
A