Kate used to be________ ,but now she enjoys meeting and talking to new friends.
A:active
B:shy
C:honest
D:outgoing
根据课文看拼音写汉字
chán
ē
lín lín
zhuì
____弱
____娜
波光____
点 ____
páng xiè
hé
chóu
____
干____
____眉苦脸
若 3m-2n2n+1与3是同类最简二次根式,则求mn的值.