— I can’t open this door, Jack. Could you give me a hand? —_________.
Lisa used to ________the bus to go to school,but now she is used to ________there.
Students should learn how ________ problem.
—Why is Linlin practicing speaking English? —________ abroad for further study.
—Why are you so excited today? —We were told ________ a picnic this weekend.
How kind you are!You always do what you can ________ others.