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PLEASE COME IN

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/15 07:40:03
PLEASE COME IN
1-Why I couldn't get you on the phone this morning.
-we __tennis in the yard when you phoned me.
A must be playing B must have been playing
2-do you still remember when we went to the Great Wall?
-I can't remember it well,but __it have been sometime last May
a should b could
嘎,两题都应该是B,但为什么呀
1ses340403说------B,(表示过去正在发生的事) A不能表示过去正在发生的事吗?
1-Why !I couldn't get you on the phone this morning.
-we __tennis in the yard when you phoned me.
A must be playing B must have been playing
only must have been doing indicates what was happening in the past..
A is not correct in that it indicates only what is happening ,not what was happening
2-do you still remember when we went to the Great Wall?
-I can't remember it well,but __it have been sometime last May
a should b could
Here,the person who responded does not have any certainty with respect to the statement.Thus could is used,whereas should imples a certain degree of certainty