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
為什麼答案是 B
contribute to 意為「導致、促成、有助於」，完美契合「許多因素導致有毒氣體濃度增加」的語境，為本題正確答案。
載入中…
