Although you have traveled to many scenic spots before, of them are as attractive as the one I visited this summer vacation.
| A．any | B．none | C．neither | D．all |
_______ is even important is ______ as the earth cooled down, water began to appear on its surface.
| A．That, that | B．What, that | C．What, what | D．It, that |
When we get closer to the moon, we shall feel its gravity pulling us, but it will not be ________ the earth’s.
| A．as a strong pull as | B．a pull as strong as | C．as strong a pull as | D．as strong pull as |
Why______you do everything as if you have to win?
| A．must | B．can | C．need | D．shall |
–Try not to work yourself too hard. Take it easy.
–Thanks. _______.
| A．No way | B．So what? | C．You too | D．What for? |
Mr. Smith is always on time for everything. How ________ it be that he was late for the flight?
| A．can | B．must | C．may | D．need |