sleep可定可表,asleep只表不定,sleeping只定不表,这句话对吗?如果不对,应该怎么改?

设能装订x本
300:x=(20+5):20
300:x=5:4
x=300×4÷5
x=240
答:能装订240本

看上去像打错了,猜是friends.
疑问are they good friends?
肯定They're good friends
否定they are not good friends

今天,小强没有来上学,他大概是生病了.
今天,小强没有来上学,他肯定是生病了.

Are they clever boys?
Yes,they are.

Is Luncy a pretty girl?
Yes,she is.

改什么?否定句吧,什么可定句,我还没听过呢
That is a chair .------ 否定句：That isn't a chair.
一般疑问句：Is that a chair?
你给的是一个肯定陈述句,改否定句只要在系动词后加 否定词 not ,变一般疑问句只需要把系动词提到句首,加问号即可

清,努尔哈赤

家是容纳,家是关爱,家是归宿,家是每个人心中的阳光,奉献着七色光芒.
天涯浪子,四海为家,家是风情和浪漫；莘莘学子,祖国是家,家是情丝和牵挂,风险航员,天地为家,家是尊严和荣誉.
“临行密密缝,意恐迟迟归.”家是思念和温馨.
“柴门闻犬吠,风雪夜归人.”家是温情和着落.
“月明星稀,乌鹊南飞.”是找不到家的凄凉和沦落.
“绕树三匝,何枝可依.”是找不到家的迷惘和伤心.
茅屋为秋风所破,是失去家的伤心和怜惜.
想家的时候,月亮是唯一的风景,星星是唯一的语言,泪水是唯一的家书,回忆是回家唯一的路,想家的时候,心中的阳光便会发出五彩的光芒.夜深人静的时候,是想家的时候,想家的时候很甜蜜,家乡的月儿抚摸着我的头；想家的时候很美好,家乡的柳儿拉着我的手；想家的时候有泪水,泪水却伴着泪水流；想家的时候,很想为家做点事,不管离家有多么遥远.
家是一轮照在冬日的阳光,使贫病交迫的人感受到了人间的温暖；家是一柄撑在雨夜的小雨伞,使漂泊异乡的人得到了亲情的荫庇；家是一架黑夜里的灯,让迷途航员回到了温馨的港湾；家是一颗含在嘴里的奶糖,让长饮黄莲的人尝到生活的甜蜜；家是一条飞架在天空的彩虹,让满目阴霾的人看到了世界的美丽.
万物的生长离不开阳光,人的成长也离不开阳光.因为阳光给人关爱,给人呵护,给人幸福.家也是如此.

As the saying goes "Health is Wealth",we all know how important one's health is.Here are the necessary rules to stay healthy:
Eat healthily.Add a lot of fruits and vegetables in your diet.Say no to junk food as they do not help but only make you gain weight.Avoid eating fatty meats like pork,ham,sausages and salami.
Quit Smoking.Smoking kills.As we all know,smoking can cause various health problems like lung infection,cancer,kidney infection etc.Though it is difficult to quit smoking,you are sure to make it with the help of others and your own perseverance.
Reduce Stress.A sound mind gives a healthy body.Try and do something you like and not think about anything negative.Pamper your body and your soul.
Hygiene.Take bath regularly and wear clean clothes.Clean body makes you healthy.
Last but not least,remember that early to bed and early to rise makes one healthy,wealthy and wise.