We really don’t know ________ . Could you help us？
| A．how to do | B．what to do |
| C．to do what | D．to do how |
--- How are you ? --- _______, thanks.
| A．Five | B．Good | C．Fine | D．Hello |
--- ________ ? --- It's blue.
| A．How are you ? | B．What color is it? |
| C．What's this ? | D．How many books are there? |
---Hello, Sam. ---.
| A．Yes, David | B．Sorry, David |
| C．How do you do, David | D．Hi, David |
—Are those your pens? —______.
| A．No, it isn’t | B．Yes, they are |
| C．Yes, they’re | D．Yes, it is. |
Li Lei and Liu Ming ____ friends.
| A．am | B．is | C．are | D．be |