How I wish I could sleep longer! However, I had to get there before the plane_________.

The flu is believed _____ by viruses that like to reproduce in the cells inside the human nose and throat. [ ]

________silk feels soft and cool, it’s difficult to be taken good care of.

A person’s life is like a road lots of difficulties.—So we need positive energy.

35 —I’m sorry I’m late I got held up in the traffic on my way here —___________________