填空中文；Here ( ) a book .Here ( ) some pens.What ( ) in your hand ( ) two hats in my hand

is 单数
are复数
is
there are（复数）某地有某物。

Here (is ) a book .
Here (are ) some pens.
What ( is) in your hand ?
(There're ) two hats in my hand

在英语中记得单数用is复数用are ,
a book is
some pens. are
对未知的用单数 is
表示某地有某物 用 there's be 结构
two hats 是复数。 there's are

Here ( is ) a book . Here ( are ) some pens. What (is ) in your hand ? (There're ) two hats in my hand

祝你学习进步，更上一层楼！ (*^__^*)
不明白的再问哟，请及时采纳，多谢！

Here ( is ) a book .Here ( are ) some pens.What ( is ) in your hand ( There're ) two hats in my hand.

Here ( is ) a book . Here ( are ) some pens. What ( is ) in your hand ? ( There're ) two hats in my hand.