_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
--- Bob, your room is a real mess! ---. I’ll clean it up right away.
---I’m afraid I’ve got a bad cold. ---
After school he didn’t go home. ___________ he went to the Internet cafe.
Scientists are trying to ways to treat the terrible disease called H7N9.
—I feel stressed out from time to time. Could you give me some advice? — __________ sharing your worries with your parents?