Frank is fine.（改为同义句）

This is a pen.(对划线部分提问)

用a 和an填空。

1.It is _____ ruler.

2.That is ____ key.

3.Is this ____ English book?

4.Look! It’s ___ UFO in the sky!

5.He is ____ NBA player.

当你向别人询问远处的东西时，你应该说（  ）。

A. What’s this?        B. What’s that?

C. Please spell it.      D. What’s this in English?

What’s that?-----It’s an ______.

A. ruler              B. orange

C. pen               D. key

Lin is ____ good basketball player in the NBA.

A. a              B. an

C. the               D. /