-- I love the Internet. I’ve made many friends on the Net.- _____. Few of them are your real friends.
.In this experiment, they are wakened several times during the night and asked to report what they__________.
--I hear Michael is in hospital. ----Oh, really? I____know. I______go and visit him.
Children find_____difficult to sit for hours with little to do while flying.
---Must I see a doctor right now? ----No, you______see a doctor for the time being.
This work, when we find it and do it----_________only as a hobby at first---is a key to our true happiness.