请选择ABCD;Q8O,T*z8W:B/C*a2{4YIt is good to go swimming _________ .2F:J0['G0O9Z+H
A. in this time of year2F:J0['G0O9Z+H
B. at this time of year2F:J0['G0O9Z+H
C. for this time of year2F:J0['G0O9Z+H
D. on this time of year2F:J0['G0O9Z+H