根据句意及首字母提示完成单词
(1)My father is l____ on the grass.
(2)Do you often w____ after supper?
(3)—What are you doing now? —I am t____ photos.
(4)We are w____ for the bus.
(5)I usually send a p____ to Miss Wang on Teachers’ Day.
为了节约能源,需要提高热机的效率,下列措施中不能提高效率的是( )