Water dropping day by day wears the hardest rock away.为什么不是water is dropping.

Water dropping day by day wears the hardest rock away.为什么不是water is dropping. dropping , The flowers will die unless___every day.A watered B watering C water D to water I___the trees every day A.water B.am watering C.am going to water The firefighters are dropping (water) on the fire.括号部分提问 一道托福阅读题The same thing happens to this day, though on a smaller scale, wherever a sediment-laden river or stream emerges from a mountain valley onto relatively flat land, dropping its load as the current slows: the water usually spreads as the tides change,the water level in a bay varies sinusoidally.at high tide today,at 8am,the water level was 15feet; at low tide,6hours later at 2pm,it was 3 feet.how fast,in feet per hour,was the level dropping at noon todayA 3 B pai(3)^(1/2)/2 C Drinking enough(b )water every day is necessary for us填什么? We all think ____that subject A better to drop B it better to drop C it better dropping D better dropping这个搭配的用法是什么? 英语选择题The little girl ___ her cup a moment ago,but luckily it wasn`t brokjen.A dropped B is dropping C had dropped D was dropping Will you please_____your shoes on the floor?A.not to drop B.not dropC.don't dropping D.not dropping （清说明理由） 三道英语完形填空节选.1.Two young girls were boasting about their beautiful hands.One put her hands in shining water,ans the_____looked like diamonds dropping from them.A.balls B.grapes C.drops D.sands2.These hands hace been____to making the he was mad atin the English exam.A.failing B.fail C.dropping D.lose The price of the house is raising rather than _____. A drop B dropping They are ----a Frisbee.A putting B dropping C throwing D making This kind of flowers need _____every day.A.watering B.to water C.water D.watered书上的答案是A,为什么? She said to me,The flowers in the garden need --- every day.A.to water B.watering C.be waterend D.water为什么? the flowers need_____(water)every day.