Leave your key with a neighbor you lock yourself out one day

The website is very popular. And it’s amazing that __________ designer of it is just __________ nine-year-old child.

Now large numbers of young people in China ________posting voice messages, articles and photos onto the WeChat (微信) to share with their friends.

I don’t know to use this machine.一It doesn’t matter. Here is the instruction.

His ideas are________and I suggest you think twice before you accept them[ ]