1.It is as pleasant _B___day as I have ever spent.
A.aB.theC.\D.an
特指,这是我所度过的最快乐的一天啦.
2. Hundreds of jobs___B_if the factory closes.
A.loseB.will be lost C.are lostD.will lose
表将来,再是被动
3.He _B___in this college for five years before Icame here to study.
A.has beenB.had beenC.have been D.is studying
I came here to study发生在过去,而他在这所大学已经待了5年,发生在过去的过去,所以是过去完成时
4.How__B__can you finish the drawing?
A.oftenB.soonC.longD.rapid
how often多久一次,不对
how rapid.不是问时间
how long与how soon都可以用来提问时间.
但是how long一般用于提问完成时,例如：
How long have you been there?-I have been there for 3 years.
而how soon是用于提问将来时的,例如：
How soon will you arrive here?-I will arrive here in 3 hours.
换一个说法.如果答句中用的介词是for前面就要用how long；如果是in,前面要用how soon
how long指的是多长时间,多长的长度
比如:how long have you been collecting
dolls 你收集玩具多长时间了?
how soon指的是多快, 比如how soon will you be there?你多快能到那儿?
5.---___A__the blackboard ,Mary?
---It is your turn.I did it yesterday.
A,cleaningB.you cleanC.to lean D.don't clean
动名词作主语,就是ing形式
B不符题意,C表目的,不对,D也不符题意