The Suspicious Panda

Question: A panda walks into a local restaurant. He eats some pickled bamboo, shoots the manager, then walks out the door. The police arrive and question the panda. "Did you shoot the manager?" they ask. "Look at the dictionary," the panda replies. What does the dictionary say?

Question: What can be broken but never forgotten?

Question: You are trying to get your chicken, fox, and wheat to the barn. However, the barn is on the other side of the river. You are on a boat and can only transport one animal or wheat at a time. You must choose carefully not to leave the wrong two together, though. It's either the fox will eat the chicken or the chicken will eat the wheat. How do you take each thing across safely?

Question: During what month do people sleep the least?

Question: When is 99 more than 100?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?