新概念二练习题解They have been gathering this year's crop,they have been____A assembling it B picking it up C collecting D bringing it in 为什么答案是D,

新概念二练习题解They have been gathering this year's crop,they have been____A assembling it B picking it up C collecting D bringing it in 为什么答案是D,
新概念二练习题解
They have been gathering this year's crop,they have been____
A assembling it B picking it up C collecting D bringing it in 为什么答案是D,

新概念二练习题解They have been gathering this year's crop,they have been____A assembling it B picking it up C collecting D bringing it in 为什么答案是D,
D有与生产相关的意思,其他三个没有.你要看详细解释的话就往下看吧,都是抄的字典~
bring in
Law To give or submit (a verdict) to a court.
【法律】 宣布（裁决）
To produce,yield,or earn (profits or income).
生出、产生或挣得（利润,收入）
pick up
To take up (something) by hand:
拿起：用手拿起（某物）：
pick up a book.
捡起一本书
To collect or gather:
收集或聚集：
picked up the broken pieces of glass.
拾起玻璃碎片
To tidy up:
整理,收拾：
Let's pick up the living room.
我们收拾一下卧室吧
To take on (passengers or freight,for example):
承载（客人,货物等）：
The bus picks up commuters at three stops.
公共汽车在三个站载送通勤者
Informal
【非正式用语】
To acquire casually or by accident:
不经意得到：随便或偶然地获得：
picked up a mink coat on sale.
拍卖时随手买了一件貂皮大衣
To acquire (knowledge) by learning or experience:
学得：通过学习或经历获得（知识）：
picked up French very quickly.
很快地学起法语来
To claim:
认领,索取：
picked up her shoes at the repair shop.
在修鞋铺领回鞋子
To buy:
购买：
picked up some beverages on the way home.
在回家的路上买些饮料
To accept (a bill or charge) in order to pay it:
付帐：为买某物而付（款或账）：
Let me pick up the tab.
我来付计程车的钱
To come down with (a disease):
染上（病）：
picked up a virus in the office.
在办公室染上病毒
To gain:
获得,赢得：
picked up five yards on that play.
在那次游戏中获得五码
Informal To take into custody:
【非正式用语】 监护,逮捕,拘捕：
The coast guard picked up five smugglers.
海岸检查官拘捕了五个走私犯
Slang To make casual acquaintance with,usually in anticipation of sexual relations.
【俚语】 勾搭：与…偶然结识,常指期望在性关系中结识
To come upon and follow:
追踪：偶然遇上并跟随：
The dog picked up the scent.
狗追着气味走
To come upon and observe:
发现：偶然遇到并观测：
We picked up two submarines on sonar.
我们用声波定位仪观察到两条潜水艇
To continue after a break:
恢复：休息后继续：
Let's pick up the discussion after lunch.
我们吃过午饭再继续讨论吧
Informal To improve in condition or activity:
【非正式用语】 有起色,改善：在条件或活动上提高：
Sales picked up last fall.
去年的销售有起色
Slang To pack one's belongings:
【俚语】 收拾行李：收拾某人的东西：
She just picked up and left.
她收拾了一下行李就走了
collect,gather,assemble
是词义很近的同义词,它们的一般含义是“收集”或“使…集中到一起”.
collect 通常表示有目的或有挑选的收集,而gather 一般表示由少积多的收集.
He knew I collected birds' eggs…
他知道我收集各种鸟蛋……
He collected a lot of valuable stamps.
他收集了许多有价值的邮票.
He was a collector.
他做过收租人.
The teacher collected all the pupils in front of the classroom buildings.
老师把小学生招集在教学楼前.
The pirates would often bury gold in the cave and then failed to collect it.
海盗常把金子埋藏在山洞里,而后来又没能取走.
此外,gather的用法较广泛,能组成不少的习语.如：be gathered to one's fathers(死亡),gather the brows (眉),gather oneself together(振奋精神).collect 和gather 有时虽然可以换用(如：He collected his belongings and went away.此句中的 collected 便可换以gathered,句子的意思并不改变.)但是collect one's thoughts 与gather one's thoughts 之间便有明显的含义差别,前者的意思是把自己的思想有条理地组织起来,后者的意思是把分散了的思想集中起来.collect money 表示为某目的而收款或募款,而gather money 则表示积钱.
A large crowed gathered under the Town Hall clock.
一大群人聚集在市政厅的大钟下.
The whole village has been working day and night gathering and threshing this year's crop before the September rains.
全村日夜辛苦地干着,要在9月的雨季之前收割并打完今年的庄稼.
The country girl gathered some firewood.
那个农家姑娘拾了些柴火.
assemble 强调把数个个体紧密地联合在一起,或者表示这种联合是自觉的而且有一定的目的的.
The students assemble for class at 8 o'clock in the morning.
学生早上八时聚集在一起上课.
It was here the scattered forces of the revolution assembled in the autumn of 1928.
就是在这里,分散了的革命武装力量于1928年秋季聚集起来了.
The workers who assemble cars work very skilfully.
装配汽车的工人们干得很熟练.