假如你有英国朋友过生日时,你应该对他说:“ ”。 A. Merry Christmas! B. Happy New Year! C. Happy Birthday!
The windows must _________ before you leave the room.
I am very sad that I ______ many chances in the last few years.
—Must we clean the classroom now? —No ,you _______.
—____________? —Very well, thanks.
Scientists can make the robots __________.