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. /
---- ____________?
----R-U-L-E-R.
A. What’s this? B. Is this a ruler?
C. Is it a ruler? D. Spell it, please.
What’s this, Grace?
---- ___ an orange.
A. this is B. It’s
C. This’s D. that is
