It was not until the end of the trip ______ I realized what a good feeling it was to have helped someone in trouble.
— 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.
Christmas is a Christian holy day usually celebrated on December 25th ____ the birth of Jesus Christ.