David is ____ student in our class. Nobody is taller than him.

Do you know how to learn English well as _________ second language?

I don’t think we can find a new day to work out the problem. — But we’d better not .

RT-Supermarket _______at 9 a.m. and it ______ for 10 hours every weekend．

I hope there are enough glasses for each guest to have ___.