After dinner, Lisa and her mother are in the kitchen.
Lisa: ?
Mother: Well, it's very easy to use a dishwasher. First, we need to run the dirty dishes under tap water before placing them in the washer.
Lisa: Mom, can't the washer clean the dishes? Why do we have to run them under water first?
Mother: Honey, if we simply put the dirty dishes in the dishwasher, they will not come clean. Just make sure there is no food left on the dishes before we put them in.
Lisa: OK, I see. What's the next step?
Mother: Next, let's put the dishes on the bottom rack(支架). And then, put the glasses and cups in the top rack. Place these face down.
Lisa: OK. Dishes down, cups up. Right?
Mother: Yes. Now, add two spoons of detergent(洗涤剂). Finally, turn on the dishwasher. To save water, we usually choose the lightest cycle on the dishwasher.
Lisa: Well, it all seems very easy.
⑴Please guess what Lisa might ask.
⑵Put the pictures in the right order.
_
⑶Why do they usually choose the lightest cycle on the dishwasher?
A. To save water.
B. To move the cups.
C. To keep the washer clean.
D. To make detergent stay longer