他们一到那儿就开始工作了吗?
____________________
必须要采取行动来阻止疾病的传播。
____________________
你越小心越安全。
____________________
—Look! There's litter ______ on the ground.
—Let's go and pick it up.
—______ is Jack feeling after the accident?
—Thanks! He is Ok now.
—It has taken Miss Li a long time to listen and talk.
—She is always ______ with young children and doesn't get angry easily.
