单项选择题

______ from the space, the earth looks like a blue ball as it is mostly covered by water.

A．Having been seen
B．Being seen
C．Seen
D．Seeing
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单项选择题
He didn t come to the party last night. He ______ to see us.
A．might not have wanted
B．could not have wanted
C．should not have wanted
D．ought not to have wanted
单项选择题
But for your help, I ______ the task by myself, so much thanks to you.
A．would not finish
B．have not finished
C．will not finish
D．would not have finished
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