单项选择题
Europe's earlier industrial growth was （）by the availability of key resources, abundant and cheap labor, coal, iron ore, etc.
A．constrained B．remained C．sustained D．detained
单项选择题 In November 1987 the government （）a public debate on the future direction of the official sports policy.
单项选择题 Over the past ten years, natural gas production has remained steady, but （）has risen steadily.
单项选择题 The cut in her hand has healed completely, without leaving a （）
