Rising evidence suggests that the use of the vaccines(疫苗)will be effective tothe spread of common cold.

— Where are Jack and Mike? — They____the furniture you asked for into thehouse.[ ]

Why are you so — Because our ping-pong player Wang Liqinhas won the world championship.

We must take measures to protect the environment from _____. [ ]

ear’s children’s party, ________ some parents were invited to, was a great success.