21. The second Sunday of May is ______ Mother’s Day. It’s ______special day for children to show their love for their mothers.
A. a;the B. the;a C.不填;a D.不填;the
22. I have problems _______many things. For example, I have problems ________
learning Maths well.
A. with, in B. about, with C. in, with D. in, about