高中英语单选一道Itwasabout600yearsagothefirstclockwithafaceandanhourhandwasmade.A.thatB.untilC.beforeD.when老师上课讲是强调句,用that.但是我觉得填when的话,也可以啊……在此请教,望讲明白

Question

高中英语单选一道
It was about 600 years ago _______ the first clock with a face and an hour hand was made.
A.that
B.until
C.before
D.when
老师上课讲是强调句,用that.但是我觉得填when的话,也可以啊……在此请教,望讲明白一些...
一楼大哥,别光填一个选项啊,..

Answer 1

使用it is .that...的强调句时应注意以下几点：
1.当被强调部分指人时,可用that,也可用who；指物时,只用that,如：
It was Tom that（who)I met last week.(在这里who和that都可以用)
It is a new book that his brother wants to buy.（在这里只用that）
2.强调状语时,只用that,不用when、where.如：
It is at 5 o'clock that the train will arrive.
你的疑问就出在第二点上,“about 600 years ago”是一个状语,在英语语法中,when是不允许在这里使用的,这是约定俗成的事.
这是it is .that...的强调句的规律,需要记住.