— How many students are going to the Great Wall? — ____.

I would appreciate________ if you could offer some help when I am in trouble.

People of different countries and regions, different nationalities and cultures have formed with solidarity an Olympic family, ______they have deepened understanding and enhanced friendship.

—Would you like tea or coffee? —_____________is ok. I’d like water.

Science is more than a collection of unrelated facts; to be meaningful and valuable, ______ must be arranged to show generalized character.