15. The real challenge is how to balance complex variables like safety and convenience, all while _____ politicians that they should invest in infrastructure.
(A) convince
(B) convinced
(C) convincing
(D) to convince

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統計: A(3), B(19), C(73), D(9), E(0) #1566099

詳解 (共 5 筆)

#3901648
分詞構句主動用Ving,被動用p.p.
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#3923502
 一直, 始終 all the whi...
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#7173380
這是一道關於分詞構句(Reduced A...
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#2191464
  infrastructure  =u...
(共 40 字,隱藏中)
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#5643194
想請問這題的原來句子應該是..., and it all while convinces politicians...嗎?
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