Many factors ___ to increased level of toxic gases and one factor which is often ignored by people is the emissions of the public transportation.
Aalign
Bcontribute正確答案
Chappen
Dmanage
答案與詳解
B
正確答案
本題測驗片語「contribute to」（導致、促成），意指許多因素導致有毒氣體濃度增加，正確答案為 B。
載入中…
