--I think it is necessary for everybody to take action _______ the Earth.--I agree. Turn off the lights before we leave the classroom.
Mary told me that the book must ______ to the library in two days.
______ you wait a few more minutes? It’ll be your turn soon.
–- How long may I ______ your bike?-- For a week. But you mustn’t _____ it to others.
_______ it’s difficult to make her dream come true, she never gives up.
Lucy knew nothing about it _____ her sister told her.