"I want to go to Mars （火星），because it's a place that no one______to before，"said Carson．（ ）
A．has goneB．has beenC．wasD．went
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
I haven't seen my best friend Lucy for 2 months． I'm looking forward to______________ a video call with her．（ ）
A．haveB．havingC．has
The school____________ the sports meeting because of the bad weather．（ ）
A．put offB．put upC．put on
China is over 5，000 years old． It has a much__________ history than the USA．（ ）
A．longB．longerC．longest