Today， WeChat becomes very popular， and quite a lot of people like to use it to ______ each other．（ ）
A．get in touch withB．catch up with
C．keep up with
Allen， shall we go to the bookstore this afternoon？
I'm sorry， David， but I ______________meet my cousin at the train station．（ ）
A．have toB．canC．mayD．could
"My People， My Country" is __________movie I've ever seen．（ ）
A．more educationalB．the most educational
C．educationalD．less educational
In Chinese families， people won't start dinner ___________the elders take their seats．（ ）
A．afterB．whenC．becauseD．until
Teachers expect all their students ___________progress day by day．（ ）
A．to makeB．makeC．to takeD．take
Is this hat_______________？
No， the red one is_________．（ ）
A．Lucy's； herB．Lucy； her
C．Lucy's； hersD．Lucy； hers