—What do you think our descendants（后代） be like in thousands of years?
—Who knows exactly what happen to human beings?
| A．will; should | B．can; must | C．shall; might | D．would; may |
The terrible fire broke out suddenly. The family, luckily, was able to _____ it in time.
| A．get off | B．get away from | C．get out | D．get on |
Chinese exports have been hit hard by falling world demand, with millions of workers _______ to their villages after the factories that employed them closed down.
| A．returned | B．returning | C．have returned | D．return |
The US is about the same size as China, but its population is five times ____.
| A．as little | B．smaller | C．as few | D．fewer |
The number 5.12 is a special number, ______I think, that will be remembered by the Chinese forever.
| A．what | B．it | C．which | D．one |
—When did you come back?
—An hour ago. Youthe computer games.
| A．have played | B．were playing | C．played | D．had played |