The element radium, ______ in the chemistry lab, gave off a blue light.
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A
discovering
B
to be discovered
C
to discover
D
discovered
推荐题目
Samuel Clemens，______ Mark Twain, wrote many popular stories.
#96397
A
was known as
B
known as
C
was known for
D
known for
We’ve never expected___ so many valuable finds from this archaeological site.
#97252
A
there being
B
to there be
C
there to be
D
to be there
_________ that he had fallen behind,he tried to work harder.
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A
Having realized
B
Realized
C
Realize
D
To realize
“How do you deal with the disagreement between the company and the customers?” “The key ______ the problem is to meet the demand ______ by the customers.”
#98434
A
to solving, making
B
to solving, made
C
to solve, making
D
to solve, made
The tower ________ now in the distance will be completed in two months．
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A
being built
B
to be built
C
built
D
having been built