We'll ( ) on Sunday evening A、is back B、be back C、back D、are

We'll ( ) on Sunday evening A、is back B、be back C、back D、are I expect____next week.A.be back B.to be back C.being back D. l'll return the pen ( )you soon A:back to B:back form C to D And we are go comeing back on Sunday afternoon. I will be back ( ) a moment.A of B in C on D for He will be back __ a few weeks.A.in B.on C.for D.at ( ) 5.We got back Beijing by plane on May 7th.改错 A B C D 选择.My sister ____ in a week.A.will back B.will be back C.is An on the back (),there is a map.A bookcase B floor C wall D My father____in two days.A.will back B.will be back C.is bar The light is on .Mr Green ____ back home.A.can't B.must be C 为什么是We'll be back而不是We'll back?back不是可以做动词吗?