The United States _______one of the lowest smoking rates -25.5 percent of the population.
.Before she came to England, she had never heard a single English word ___________.
--- Sorry, I'm afraid I can't go camping with you. I have to make a good preparation for the entrance college examinations. --- __________! We can camp together next time.
I have had my bike _____, and I'm going to have somebody______ my radio tomorrow.
I sight of an empty seat at the back of the bus and went directly there.
is no need