1．(2020·高考全国卷Ⅲ)As the small boat moved ____________(gentle)along the river he was left speechless by the mountains being silently reflected in the water.
2．(2019·高考全国卷Ⅲ)They also shared with us many ____________(tradition)stories about Hawaii that were ____________(huge)popular with tourists.
3．(2018·高考全国卷Ⅰ)According to a review of evidence in a medical journal，runners live three years ____________(long)than nonrunners.
4．(2017·高考全国卷Ⅰ)However，be ____________(care)not to go to extremes.
