问题
选择题
China ________ rapid economic development and political stability over the past three decades, but with them ________ some social problems.
A．has seen; has come
B．had seen; are coming
C．saw; will come
D．has seen; have come
答案
答案：D
考查时态。over the past three decades表明句子用现在完成时，some social problems作主语，谓语动词用复数，所以选D。