The school made it a rule that the students should ______to their feet when class begins.
Only in that way _______ ready for the challenges and opportunities in life.
— Are you going to the party this weekend?— ______.
Helen ______ go on the trip with us, but she isn’t quite sure yet.
It may rain --- you’d better take an umbrella _______.
----Thank you for your CD - ROM. I’ll return it as soon as I can. ---- ________. I’ve got another one to spare.