His thoughts were ________ from the subject by the arrival of his friends.
A. attracted
B. suffered
C. distracted
D. related
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The young professor ________ himself as an international leader in the field of mathematics.
A. established
B. built
C. founded
D. found
She is a ________ woman who is certain of her ideas and actions.
A. significant
B. aware
C. confident
D. intense
________ I admit that the problems are difficult, I don't agree that they can’t be solved.
A. For fear that
Because
C. While
D. Until
I am going to spend the winter vacation in Shanghai, ________ I have relatives.
A. because
B. which
C. that
D. where