Over millions of years, birds such as ostriches, emus and penguins have lost the ability to fly.
Agradually正確答案
Bproperly
Csuddenly
Dtemporarily
答案與詳解
為什麼答案是 A
gradually（逐漸地）與「Over millions of years」時間跨度完美搭配，描述鴕鳥、鴯鶓、企鵝經演化逐漸失去飛行能力，語意最通順。
考點：時間副詞搭配考點：語意不合考點：時間概念矛盾考點：語意錯誤
載入中…
