The flowers will die soon unless often ________.
—I want to get a license. What do you think I should do? —Only with enough practice ______ the driving test, I think.
Not only ______ strict with us, but also ______ for us .
—It’s the first time for me to stand on the stage. —______. I believe you can perform well.
--I’ m going to swim with my father in the river this weekend. --_________.
_______ finish their task ahead of time, the students worked harder and harder.