They are looking at the dresses .(改为单数句)

They are looking at the picture(改为否定句） Are your parents watc the boys are looking at the blackboard改为否定句. They are on the sofa改为单数句 they are orange sweaters 改为单数句 They are American teachers(改为单数句) Are they women doctors? 改为单数句 They are my friends.改为单数句 They are old jeeps. (改为单数句) 把They are apples.改为单数句 Are they students?（改为单数句） They are English jeeps.改为单数句 they are eggs改为单数句