Melting ice（融冰）can cause sea levels to rise． Since 1993， sea levels _______ at a speed of 3.2 cm every 10 years． （ ）
A．roseB．have risenC．rise
Melting ice（融冰）can cause sea levels to rise． Since 1993， sea levels _______ at a speed of 3.2 cm every 10 years． （ ）
A．roseB．have risenC．rise
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