选词填空。
down talking can’t carry tidying
(1) I’m ________ on the phone.
(2) She’s ________ her room now.
(3) —Who can help me?
—Sorry, I ________. I’m doing my homework.
(4) The books are heavy. I can’t ________ them all.
(5) All the oranges are falling ________ the stairs.
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