Beijinghassetthecity’spopulation

問題詳情：

 Beijing has set the city’s population ________ at 23 million by 2020 due to water scarcity and big city diseases such as traffic jam.

A. budget                       B. ceiling                      C. explosion                  D. standard

【回答】

B

知識點：非謂語動詞

題型：選擇題