1.Alltheinvestigationsbeforethedeadline,thestaffdecidedtohaveapartyasacelebration.A.hadbeenfulfilledB.havingbeenfulfilled过去式的过去不是过去完成时吗?为什么选having...2.allatthepresenttimeisanurgent

Question

1.All the investigations ____before the deadline,the staff decided to have a party as a celebration.
A.had been fulfilled B.having been fulfilled
过去式的过去不是过去完成时吗?为什么选having...
2.all____at the present time is an urgent and rational decision other than endless dispute.
A.that is needed B.the thing needed
选B不行吗?为什么
3.The housewives would usually____the fruit before making their minds uo which to buy.
A.pick out B.pick over
选B...两个都有 挑选 的意思,为什么选B来?
4.With the fast development and expansion of cities,the___suburbs of which become prosperous,too.
A.exterior B.external C.outer D.outside
选C..真是搞不清楚这四个 “外部”的用法区别...求详解

Answer 1

1. 句子的真正谓语动词在后面,decided. 前面的having been fulfilled是现在分词做伴随状语,表示同时发生的一个动作or状态.
2.B项 thing要复数. 前为all...!
3.揣摩一下例句吧.
PICK OVER: 仔细检查或挑选
She is picking over a basket of oranges.
她正在拣选一篮橘子.
PICK OUT:
1.挑选出;拣出
Let me pick out some good ones for you.
让我来替你挑几个好的.
2.辨认出
It's easy to pick him out in a crowd because he is very tall.
很容易从人群中辨认出他,因为他个子很高.
4.由于xxxx,郊外也变得热闹非凡. outer 有个意思是“远离市中心的”
exterior 外表表面. external 外界外来的. outside 室外.