______ is even more important is ______ as the earth cooled down, water began to appear on its surface.
A. What, that B. That, what C, That, that D. What, what
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Since I won the big prize, my telephone hasn't stopped ringing. People ____to ask how I am going to spend the money.
| A．phone | B．will phone | C．were phoning | D．are phoning |
John ___ be a basketball player.He’s much too short.
| A．may | B．mustn’t | C．can't | D．should |
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