i （） have left my glasses on the desk of school libery yesterday afternoon.a.seem to b.seemed to c.am certain d.was certain正确选b,为什么?

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i （） have left my glasses on the desk of school libery yesterday afternoon.a.seem to b.seemed to c.am certain d.was certain正确选b,为什么?

i （） have left my glasses on the desk of school libery yesterday afternoon.a.seem to b.seemed to c.am certain d.was certain正确选b,为什么?
i （） have left my glasses on the desk of school libery yesterday afternoon.
a.seem to b.seemed to c.am certain d.was certain
正确选b,为什么?

i （） have left my glasses on the desk of school libery yesterday afternoon.a.seem to b.seemed to c.am certain d.was certain正确选b,为什么?
因为有明确的表示过去的时间yesterday afternoon,所以用一般过去时,这样可以排除a,c
certain的用法是：
1、be certain that
2、 be certain to
如果d 的certain后加了to,那么它也是对；没加就不对,所以不能选.
这样就只有b是正确答案了.

因为是过去时，删掉a和c，在b和d里选
seemed to 表示 我好像····样，
was certain 表示我十分确定我·····样了

因为有明确的表示过去的时间yesterday afternoon，所以用一般过去时，这样可以排除a, c
certain的后面接that或to do形式的宾语，而这里的d选项在certain后面没有that或to do，我无法和后面的成分相连接起来的。
选b.是正确的。因为seemed是系动词，to have my .......是一个不定式短语作表语。...

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因为有明确的表示过去的时间yesterday afternoon，所以用一般过去时，这样可以排除a, c
certain的后面接that或to do形式的宾语，而这里的d选项在certain后面没有that或to do，我无法和后面的成分相连接起来的。
选b.是正确的。因为seemed是系动词，to have my .......是一个不定式短语作表语。

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