688.rainbow(名)彩虹
Do you see rainbow?你看到彩虹了吗？

689.rainy(形)多雨的
Most tropical areas have rainy and dry seasons.大多数热带地区有雨季和旱季。

690.read(动)读、看懂
不规则变化read, read
I reed a good article in today's paper.我在今天的报纸上读到了一篇好文章。

691.ready(形)准备就绪的
Is breakfast ready?早餐准备好了吗？

692.real(形)真实的
Is this real leather or plastic?这是真皮的还是塑胶的？

693.really(副)无疑地、真正地
Did she really say that?她真的那么说了？

694.refrigerator(名)电冰箱、冷冻库
Bill reached into the refrigerator and pulled out a beer.比尔把手仲进冰箱，拿出一罐啤酒。

695.remenber(动)记得、忆起
反义词forget
Do you remember her telephone number?你记得她的电话号码吗？

696.repeat(动)重做、重复
The teacher asked him to repeat what he had said.老师要他重复他所讲的话。

697.rest(名)(动)休息
(名):Let's take a rest.休息一下吧。
(动):Let's rest here far a while.在这休息一会儿吧。

698.restaurant(名)饭店、餐厅
He invited her to eat dinner at a French restaurant.他邀请她去一家法国餐馆吃饭。

699.rest room(名)公共厕所
I go to the rest room.我去洗手间。

700.rice(名)稻米
Rice is an important food in our life.在我们的生活中稻米是重要的粮食。

701.rich(形)富有的
He grew rich from selling used cars.他靠卖旧车致富。

702.ride(名)(动)骑马；乘车
不规则变化rode, ridden
(名):We went for a ride in the car.我们开车去兜风。
(动):She rode home on her bicycle.她骑自行车回家。

703.right(形)正当的、合法的
反义词wrong
The editors were right to refuse this article.编辑们不接受这篇文章是有道理的。

704.ring(名)戒指(动)响
不规则变化rang, rung
(名):She wears a diamond ring.她带着一个钻戒。
(动):I was making the bed when the telephone rang.我在铺床时电话铃晌了。

705.river(名)河、江
He sat down on the bank of the river to fish.他坐在河边钓鱼。

706.road(名)公路、道路
Turn left off the main road. 向左转离开大道。

707.robber(名)抢劫者，强盗
The robbers escaped with the jewels.强盗带着珠宝逃跑了。

708.rose(名)玫瑰花
There is no rose without a thorn.没有无刺的玫瑰。

709.round(介)环、绕
They sat found the table.他们围桌而坐。

710.rule(名)规则、法规
It's against the rules of the school to smoke.吸烟是违反校规的。

711.ruler(名)统治者；尺
She was than ruler of Egypt,她当时是埃及的统治者。
The boy used a ruler to draw straight lines.这个男孩用一把尺画直线。

712.run(动)跑
不规则变化ran，run
He had to run to catch the bus.他不得不跑过去追赶公车口

713.sad(形)悲哀的、忧愁的
She is still very sad over the death of her aunt.她对姑妈的死至今然仍悲伤不已。

714.safe(形)安全的
反义词dangerous
The house is not safe from theft.这房子不安全，容易遭窃。

715.salad(名)生菜、沙拉
I am not fond of salad.我不喜欢吃沙拉。

716.sale(名)卖、出售
These goods are entirely unfit for sale.这些货物完全不宜销售。

717.salt(名)盐
Add a pinch of salt.加点盐吧。

718.same(形)相同的
通常与the或指示代名词连用
Those shirts are all the same size. 那几件衬衫都一样大小。

719.sandwich(名)三明治
He ate sandwiches in the office for lunch.他在办公室吃三明治当午餐。

720.Saturday(名)星期六
S需大写
We will do our shopping an Saturday,我们将在星期六去采购。

721.save(动)援救
The doctor saved the child's life、这位医生挽救了孩子的生命。

722.say(动)说
不规则变化said, said
The doctor said he would be all right in a few days.医生说她过几天就会好的。