V.Mark the letter A, B, C or D to indicate that underlined part that needs correction in each of the following sentences. 11. It's difficult study in a foreign country, so students need to prepare for the experience. 12. I‟m tired of being told what writing about tram system in Hanoi. 3.In 1939, no more than 15 percent of all school-age children received any kind of school. 4.It‟s convenient of us to take a cyclo and observe life in Ho Chi Minh City. 5.I had just finished my meal when he had called me out for dinner. 6.The menu has been already changed, but the customers are still complaining about the lack of variety. 7.I was surprising to learn that there was a tram system in Hanoi a centuryago. 8.A new rail system in Hanoi is expected to complete in the next few years. 9.You‟d better to listen to each other‟s ideas when living in an extended family. 10.A new advanced water treatment plant which will eventually serve 300,000 customers is now on construction. 11.The doctor suggested that she does exercises regularly and go to bed as early as possible. 12.I wish I can set foot on every corner of Vietnam when I reach40. 13.They are getting used to eating alone as their parents often come home lately. 14.It is expected that there has been more than 5 million international tourists to visit Ha Long Bay this year. 15.I used to having a very bad argument with my Maths teacher when I was at high school.