Replace the underlined words with the correct form of the words below. originate adopt enormous standardize automatically 1. Nowadays, more and more companies start to use WeChat in business communication because of its convenience and high efficiency. Replacement: 2. The way we communicate has undergone huge change since the invention of the Internet. Replacement: 3. Appearing first in Japan, emojis allow people to liven up their texts with colorful images. Replacement: 4. It's difficult to unify the definition of Internet slang due to the constant changes made to its nature. Replacement: 5. The feature of the new communication tool is that it can generate emojis without people doing anything based on their facial expressions. Replacement: