China started its nuclear power industry only in recent years, and should ________no time in catching up.
句意：中国今年才开始发展核电产业，应抓紧时间努力赶上。lose no time in doing是固定搭配，表示“立即干某事”。delay推迟，耽搁。lag落后，停滞。lessen减少，变小。故答案选B。