The Communist Party of China will have its 100th birthday ______ July 1,2021.
A.inB.onC.forD.at
My cousin will drive me to school today,but I don't know_____.( )
what he'll do
where he'll go
when we'll leave
why we'll go there
I'm so glad that I_____nearly half of the test now.( )
finish
finished
will finish
have finished
Some volunteers are going to_____the central park. Let's join them.( )
put up
clean up
look up
give up
Train tickets_____online. It is convenient.( )
sold
were sold
are sold
have sold
Helen is the_____person in her family. Her two elder sisters are both married.( )
older
oldest
younger
youngest