July 20, 1978, when the spacecraft Viking landed on Mars, that people had their first close-up look at that planet ’ s surface feature.
A.
I t was not until
B.
Not until it was
C.
Until it was not
D.
Not until
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参考答案:
举一反三
【简答题】阅读理解。 It is common to believe that learning just takes place in school, but much of human learning happens outside the classroom, even from birth and people continue to learn throughout their lives...