If the government takes measures to enrich senior citizens’ social and spiritual life, it help develop a truly harmonious society.
A. Can
B. must
C. shall
D. should
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(答案→)A. Can
B. must
C. shall
D. should
解析：句意：如果政府采取措施来丰富市民们的社会和精神生活，它将有助于形成真正的和谐。Can能够；must必须；shall表示允诺；should应该，选A。