当你被介绍认识某人后, 你应该说: “____”。
A. Good morning! B. Thank you! C. Nice to meet you!
——What color is the pen?
——___________.
| A．It’s yellow | B．It’s a yellow one |
| C．It’s a yellow | D．It’s a blue pen |
——What’s this?
——___________.
| A．It’s a pen | B．Yes, it is |
| C．No, it isn’t | D．This is a ruler |
——__________
——P-E-N.
| A．What’s this? | B．Spell it, please. |
| C．Is it a key? | D．It’s a key. |
This is _________ orange and that is ________ ruler.
| A．a; an | B．an; a | C．an; an | D．a; a |
下列各项都属于元音字母的是___________。
| A．a, g | B．o; h | C．i; k | D．o; u |