题目内容
Pierre Curie stopped his research and ________ Marie in the search of an unknown material.
[ ]
A.
attended
B.
joined
C.
took part in
D.
joined in
答案:D
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Pierre Curie stopped his research and _______ Marie in the search of an unknown material.
| A.attended | B.joined | C.took part in | D.joined in |