The Communist Party of China will have its 100th birthday July 1，2021.（ ）
A．inB．atC．onD．around
﹣What happened to Mrs．Smart？
﹣She cut herself while she______lunch．（ ）
A．preparesB．is preparing
C．was preparing
The twins are so alike that even their father finds______hard to tell them from each other．（ ）
A．itB．himC．them
﹣﹣﹣What do you think of Teenager Said（少年说）？
﹣﹣﹣____________（ ）
A．You are welcome．B．Good luck．
C．I love it．
I wonder___________________ （ ）
A．when China sent the last Beidou Satellite（北斗卫星）．
B．when did China send the last Beidou Satellite．
C．when does China send the last Beidou Satellite．
Silver Tea leaves__________ by hand in Junshan Island．（ ）
A．is pickedB．are pickedC．picks