﹣3﹣D printing could be used to build a house in less than 24 hours．
﹣It amazing．It's my first time to get to know this．（ ）
A．soundsB．smellsC．tastes
""is used for saying that what you do is more important than what you say you will do．（ ）
A．Every dog has its day
B．Practice makes perfect
C．Many hands make light work
D．Actions speak louder than words
Thank you very much for giving me some advice on how to deal with stress．
（ ）
A．That's trueB．Don't mention it
C．OK，I'll tryD．I don't think so
I wonder．
Yes，of course．（ ）
A．why we will visit this museum
B．when we will get to the museum
C．whether the museum is worth visiting
D．what we can see in the museum
In Switzerland，things like glass and plastic into different groups and then recycled（ ）
A．separateB．separated
C．are separatedD．is separated
Watch out，Peter! is a little boy playing ahead on the road．（ ）
A．ItB．ThisC．ThatD．There