Kate used to be________ ,but now she enjoys meeting and talking to new friends.
A:active
B:shy
C:honest
D:outgoing
Jack has ____ (been/fallen) ill for two weeks.
热带和北温带的分界线是( )
在校运动会上,拔河比赛正在激烈地进行着,对于势均力敌的两个班级来说,最有希望获胜的是( )