試題詳解

 The Tonle Sap remains relatively small for most of the year, measuring about a metre in depth and covering around 2,700 km 2. However, the river connected to the lake starts to swell during the ............... season as water that flows from the Mekong River reverses, helping to expand the Tonle Sap to an area of up to 16,000 km 2 with a depth of up to 9 metres.