—How about joining us in the summer camp? —I wish I could, ___________ I have to practice for the piano test. 

The box was too heavy for me to carry, ＿＿＿I pulled it into my room. 

It was a pity. The game wasn’t on yesterday         the rain.

I really enjoyed your lecture, ______ there were some parts I didn’t quite understand. 

—It’s reported that many people were hurt in Kunming Terrorist Attacks on March 1st ,2014. — _______ bad news!