[多选题]对于10086下派至我公司或客户现场反映有关梦网业务的收费争议投诉,凡( )的,可根据实际情况酌情给予退费处理,
A.不能现场查清
B.不能合理解释
C.确实是客户使用的

At the beginning of the century, medical scientists made a surprising discovery: that we are (1) not just of flesh and blood but also of time. They were able to (2) that we all have an internal "body clock" which (3) the rise and fall of our body energies, making us different from one day to the (5) . These forces became known as biorhythms: they create the (5) in our everyday life.
The (6) of an internal "body clock" should not be too surprising, (7) the lives of most living things are dominated by the 24-hour night-and-day cycle. The most obvious (8) of this cycle is the (9) we feel tired and fall asleep at night and become awake and (10) during the day. (11) the 24-hour rhythm is interrupted, most people experience unpleasant side effects.
(12) , international aeroplane travelers often experience "jet lag" when traveling across time (13) . Pe
A. unless
B. when
C. since
D. although

Water is one of the most important natural resources in the world.
Everywhere, water use is (61) . Humans already use fifty-four percent of all the (62) water in rivers, lakes and underground. There are some estimates that this (63) will reach seventy percent by 2005.
Fresh water is necessary for life on Earth. People need water for (64) activities and to produce food. Water also is important for energy production and health of Earth’s environmental systems.
The United Nations is organizing a (65) of events to increase concern (66) water issues. UN officials have (67) 2003 the International Year of Fresh Water. A goal of the (68) is to build support for policies to use water more (69) .
Another goal is to get more people to use water in a way (70) will not hurt environment. The world population is more than six-thousand-million people. More than one-thousand-million (71
A. in
B. on
C. at
D. for