He looks sad. Let’s ___________________.

18．______ everyone knows, John has made his promise to his parents ______ he will never play computer games again

I’d like a pet, but I am busy all day.— Goldfish are a good choice. You ________ feed them every day

下列各句中加横线的成语使用错误的一项是 （ ）

Mom, where is my lunch pack—Just where it _______.