13) Lost time never is found again.
14) Rome wasn't built in a day
15) My question was answered two days ago.
16) Hockey is played in winter.
17) Mushrooms were gathered in autumn.
18) Thousands of houses were destroyed during the Great Fire of London.
19) His new book will be finished next year.
20) Flowers are sold in shops and in the streets.
21) St Petersburg was founded in1703.