E- mail is very popular today. People se
题型:选择题
问题:
E- mail is very popular today. People seldom write letters now, _________?
A.did they
B.do they
C.didn’t they
D.don’t they
E- mail is very popular today. People seldom write letters now, _________?
A.did they
B.do they
C.didn’t they
D.don’t they