_______,when Marx was already _______,he found it was important to study the situation in Russia, so he began to learn Russian.

te the old town is the 5500 meters YulongXueshan Mountain, its peak_______ with snow

“Underground” is the only word in the English language _______ begins and endswith the letters “und”.

下列各句中，没有语病的一句是（ ）

Please tell the court what really happened.–Oh, I ____ , and I hit a parked car