The irregularities may have retarded, but they had not , the growth in the volume of trade at the port.
Aprevailed
Bprevented正確答案
Cprotected
Dproven
答案與詳解
為什麼答案是 B
prevent 意為「阻止、妨礙」。retarded（延緩）與 prevented（完全阻止）形成程度遞進：「可能延緩了，但並未阻止」貿易量成長，語意最通順。
載入中…
