Mr Li asks us to remember that ______ careful we are, _______ mistakes we will make.
Li Lei isn’t ____ Liu Ming.
Please be quick, or we will have no time ____ have lunch.
—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.
On my way ____ home, I lost a ticket ____ Titanic.
Don’t let ____ in. I’m too busy to see ____.