Uncle Mike _______ to bed ______ he finished his work last night.
| A．not went; before | B．didn’t go; after |
| C．doesn’t go; until | D．didn’t go; until |
Scientists are working hard to make _______ possible for people to live on Mars in the future.
| A．it | B．that | C．this | D．one |
After you see the pictures, you will realize ______ danger the wildlife faces.
| A．how many | B．how often | C．how much | D．how long |
--- Middle school students hardly know anything about shopping online, ____ they?
--- ________. It’s very popular with teenagers.
| A．do; No | B．do; Yes | C．don’t; No | D．don’t; Yes |
In the UK, a woman usually doesn’t like to be asked _________.
| A．if she has been married or not | B．what is her age |
| C．how much she weighs | D．where she comes from |