_______,when Marx was already _______,he found it was important to study the situation in Russia, so he began to learn Russian.
The house ____ Lu xun used to live in is now a museum.
--- “ The T-shirt is too big for me, would you mind giving me a ___ one ?”---“Ok, here you are.”
___ the morning of September 8th, many visitors arrived ___ the train station for a tour.
---Excuse me , would you please speak a little more ____?---Sorry, I thought you could follow me.
—Look at the cloud! It looks like a rabit.--- Wow. _____ beautiful !