Shanghai is the first city in the world _____________ a high-speed maglev train，from the city to Pudong Airport．
#88543
A
building
B
having built
C
to have built
D
built
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If you have any difficulty ____ how to skate, you can turn to Jacky.
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A
learned
B
to learn
C
learning
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learn
________ his job application carefully, he emailed it to the company where he wanted to work.
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A
Having checked
B
Checked
C
Checking
D
To have checked
______ in a white uniform, he looks more like a cook than a doctor.
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A
Dressed
B
To dress
C
Dressing
D
Having dressed
____ to reach the headmaster on the phone, the student sent an email instead.
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A
being failed
B
Having failed
C
Failed
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____ several times, the young scientist still kept on doing his experiments.
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A
Having failed
B
Having been failed
C
Failed
D
To fail