1.Usually my homework takes 2-3 hours.2.It will take 2 or 3 hours me to get to Moscow.3.My mother cooks dinner about one hour.4.My friend did homework about one hour yesterday.5.It took about a half an hour to put a tent.6.It takes about 2 days to read a big book.7.It takes about 3 or 4 years to build a house.