There is ________ “m” and ________ “u” in the word “much”.

______do you spell your family name?—C-L-A-R-K,Clark.

Why are you standing there，Mary？-I can’t see the blackboard. Two tall boys are sitting _________ me.[ ]

What do you think of this book?— Good indeed. It ________ many problems we have in our study.

My brother is good maths.[ ]