_______ from space, we can find 70% of the surface of the earth _______ by water.
| A．Seeing …... covering | B．Seeing …... covered |
| C．Seen ...... covering | D．Seen …... covered |
相关试题
The public transportation in this city is very convenient, where many buses run ______.
| A．occasionally | B．approximately | C．immed iately |
D．frequently |
. —Where have you been all day?
—I _______ some former classmates and I couldn’t get back until it was dark.
| A．have met | B．would meet | C．met | D．had met |
. —He is eager to try something he has never tried before.
—Oh, I see. That’s _______ he’s different from others.
| A．when | B．what | C．how | D．where |
As your teacher, I could not have you ______ away with cheating in the exam.
| A．get | B．getting | C．breaking | D．break |
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