______ the students in our class is 50 and_______ them study very hard

I’m surprised that you should have been fooled by such a(an)___trick

You will _______ your health ifyou work so hard，eat a little food and sleep badly．

The charity sale our school organizes every year has taught us much. _______ we would never have learned it in class.

The Acropolis was constructed in the 5th century BC ______ a high altitude above the city _____ Athena, the goddess of Athena