V . Rewrite each of the following sentences in such a way that means exactly the same as the sentences printed before it 1 . We will solve the problem of energy shortage by using solar energy . -> The problem of energy shortage ............... 2 . Travelling around the world is interesting . -> It ....................................................................... 3. The last time I same Hoa was in 2012 -> I haven't .................... 4 . They built this building 2 years ago -> This building . ................. VI . Supply the correct from of the verbs in brakets to complete sentences . 1 . We ( visit) .......Hue next month 2 . My younger sister (collect)............dolls tow years ago 3 . Have you ever (do) ...........volunteer work ? 4 . The letters (send)................everyday