Someone is knocking at the door，but whom can ________ be?

A b<u>e</u>tween B b<u>e</u>side C b<u>u</u>sy D b<u>e</u>hind

A our B you C mine D Yours

A Not at all B No． thanks． I'm full C You are welcome D OK , here you are

A 不填; the B 不填;an C the ; an D a ; the

A explained B explain C to explain D explaining

A that B when C who D where

A went B has gone C would go D has been

A To have changed B Change C Changing D Being changed

A were put B being put C put D have put

A would see B will see C have seen D saw