1. Knowing English is very useful. => It ……………………………………… 2. It started to snow at 5 o’clock. => It ………………………………………… 3. Nam is taller than Hung. => Hung ………………………………………… 4. When did you go to bed last night? => What ………………………………………………..? 5. What time does Nam have to leave? => Do you know ………………………………………….. ? 6. To do morning exercises is good. => It………………………………………… …………….. 7. This book is very boring and so is that one.=> This book is as………………………………………… . 8. Will it be necessary for me to sleep under a net? => Shall I have to…………………………………….? 9. I last read a book on September 20th. => I haven’t ………………………………………… 10. It is not as warm in Canada as it is in Mexico. => Mexico ………………………………………… 11.An began to be interested in healthy eating 3 years ago .=> An has been……………………………… 12. I feel sick if I eat too much ice- cream. => Eating ………………………………………… 13. I have never seen that...