Our room must ___ clean.A.keep B.be kept C.to be D.kept
Our room must ___ clean.A.keep B.be kept C.to be D.kept
our room must be kept clean.中的keep不是系动词么,怎么用被动态
Water must be kept _______away. A.to run B.runs C.running D.
The book can_________for a week.A.keep B.kept C.is keep D.be
( ) 1 Our room must ___ clean.A.keep B.b
70.Water must be kept _______away.A.to run B.runs C.running
为什么是must be kept而不是must to be kept
your job ___ open for your return.A.will be kept B.will keep
Woolen clothes are used for _ warm.A.kept B.keep C.to keep D
People should ____cutting trees A be kept to cut B be kept f
We ___ him our monitor. a.made b. kept c.had d. let
the room must be kept wet.变成被动语态!