_____ you have the chance to study, you’d better make full use of your time.
---- It is said that Tom had a wonderful time at the party. ---- ______, and so did I.
My brother gave me a present for my birthday but I gave him nothing ______ his.
The top student failed again in the examination and only then ______ the importance of reading and memorizing the English texts.
Please don’t get too close to the building______ roof is under repair.
It is a great ______ for us to be invited here to meet the great scientist face to face.