—    is the river?
—It's about 2 thousand metres. ( )

A．How many

B．How long

C．Where

—______ are you from? (  )
—I’m from Beijing.

A．What

B．Where

C．When

“How”的用法。
【小题1】—____________ are these balls?
— Ten yuan.
【小题2】—____________ do you eat vegetables?
— I never eat vegetables.
【小题3】—____________ players are there on a team?
—Five players.
【小题4】—____________ do you go to Beijing?
—By train.
【小题5】—____________ are you?
—I’m 1.6 metres tall.

—______________are you?(  )
—I'm ten.

A．How old

B．How many

C．How

We’ll watch      the birds fly.（   ）

A．how

B．what

C．when