用动词be的适当形式填空 Tom and I( ) are English We( ) from Beijing Tom( )my good friend

Tom and I are English(前面的括号不必填）.we are from Beijing.Tom is my good friend.be动词的用法　　be （be/is/are/am/was/were) 　　[bi:] 　　vi 　　现在时 I am, you are, he is, we are, you are, they a...