1) Mobile phones and TVs are both electronic appliances. - это слово получится, если добавить ещё одну букву "a".
2) I can't work out the answer to this question.
3) She can predict what will happen in the future.
4) A short informative text is a message.
5) There is a lot of resistance to this new technology. People don't like it. - тут я подправил опечатки.