阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
It' s six o' clock on a cold Saturday morning．Liu Zifan reluctantly gets out of the warm bed．
"I wish I could sleep 36 more," says Liu．
The 12-year-old seventh grader from Beijing Guangqumen 37 School must take an - hour - ride to get to the school for the 38 curriculums that occupy her whole Saturday morning． 39 Sunday afternoon, she has music lessons from 3 p．m．to 7 p．m．．
During weekdays, Liu has to get up around five in the morning, and 40 home by six．
" My teacher 41 us to eat an apple in the morning so that we won' t feel 42 " , she says．
In primary school, Liu 43 taking the New Concept English class every Saturday morning, and Chinese, English and Olympic maths classes in the afternoon．On Sunday morning, she had to do 44 at home．In the afternoon, she took Cambridge English class．
"I didn't have time to rest, 45 on Friday night," Liu recalls．
The family has a monthly 46 of about 1,700 yuan．Liu Zifan' s 47 classes cost 2, 000 yuan each term．
" I think it' s 48 the money," Liu' s father says．" We do everything we can to provide her with good education, 49 she will get a good job in the future．"
Chinese children face 50 pressures on study．Some parents make their children study 51 First graders start to take classes for second graders, and so on, therefore they can get an 52 in exams．Most Chinese 53 believe high academic credentials （成绩） mean a better school, a brighter future．So they 54 their children to extracurricular classes like music, English and maths to develop a special 55 , which later might be a stepping stone to a good school．
36．A．any B．some C．even D．far
37．A．Secondary B．Training C．Language D．Primary
38．A．super B．extra C．huge D．usual
39．A．In B．For C．At D．On
40．A．get B．stay C．leave D．drive
41 A．orders B．recommends C．persuades D．suggests
42．A．sleepy B．tired C．cold D．thirsty
43．A．stopped B．finished C．enjoyed D．started
44．A．housework B．washing C．homework D．writing
45．A．besides B．including C．since D．except
46．A．pay B．cost C．income D． money
47．A．weekend B．Sunday C．everyday D．Saturday
48．A．wasteful B．worth C．valuable D．worthy
49．A．so that B．since C．now that D．while
50．A．challenging B．increasing C．developing D．changing
51．A．ahead B．hard C．late D．away
52 A．average B．achievement C．advance D．advantage
53．A．teachers B．students C．friends D．parents
54．A．send B．hope C．take D．wish
55．A．strength B．interest C．talent D．skill
纳米颗粒的总反应如下: 
===
。下列说法正确的是
氧化剂是
和
转移3 mol电子