I don't think ________ possible to master a foreign language without much memory work.

—When shall we go for an outing? —It's up to you. Make it  time you like.

I’d appreciate _____ if you would like to teach me how to use the computer.

 I have bought a good book, ______ that will surely interest         of the students．

 He is the most hard-working students in his class. That means he is more hard-working than_______ in his class.