The heating system here has an __________ temperature control.[ ]

The lady in tight black dress ______ the dishes, thinking which was her choice.

My father is a policeman. He is ________ help with my lessons.

It is difficult for a teacher to give attention to children in a large class．We should reform the situation in order to meet each child’s needs．

The twin sisters look alike. It’s not easy to tell the difference ________Jessie and Millie.