38.how long/you/learn/English/?
39.girl/whose/parents/live/Hanoi/invited/me/spend/summer holidays/there/.
40.man/who/be/black uniform/be/referee/.
41.try/use/your goods/as/economically/you/can/.
42.it/be/one/the/expensive car/world/.
43.games/exciting/enough/attract/many children/.
44.Mr. Nam/said/be/famous doctor/.
45.he/not/intelligent/understand/you/say/.
39.girl/whose/parents/live/Hanoi/invited/me/spend/summer holidays/there/.
40.man/who/be/black uniform/be/referee/.
41.try/use/your goods/as/economically/you/can/.
42.it/be/one/the/expensive car/world/.
43.games/exciting/enough/attract/many children/.
44.Mr. Nam/said/be/famous doctor/.
45.he/not/intelligent/understand/you/say/.