In these areas, there is no limestone in the rocks to neutralize the acid rain naturally. One remedy is to pump limestone into the acidic lakes. (4)_________, it is not possible to do this on a large enough scale to save all the lakes.

Definitions of music can (4) _______ dramatically over a short time, as they have across the world during the 20 (5) _________.

American football differs slightly in (3) _______ and field size from a style of football (4) _______ mostly in Canada, called Canadian football.

Mountains (4) _______ most of it. Vancouver, a major port city, is here.

That’s where the queen lives most of the year. It has about 600 (4) _______, but you’ll see only state rooms where the queen entertains guests.

Each of these “(3) _______”, as well as many other sounds (or nonsounds), has been copyrighted (4) _______ a musical composition, performed, and recorded in the 20th century.

The museum’s Egyptian collection is (4) _______ of the largest in the world.

When ambulance man Steve Lyn went to the house , he was amazed: "It's great that a young boy of six knew the right number to deal and was able to give us the correct information.” (3)______ of William's quick thinking , we were able to (4)______ there immediately.

Cheap entertainment was (5)__________ offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year

21 century teachers need to serve as a guide or mentor for their students, not as the all- knowing sage providing them with everything they need. Nowadays, with so much access (1)______ resources of all kinds, children invariably know more than teachers on different topics, step ahead of the technology. Teachers need to be empowered as facilitators for learning, so that they can empower their students in (2)______. This shift is great news for teachers. Instead of struggling to give kids all the information in areas (3)______ they know little about, teachers can support students as they make their own steps into different fields. It’s about preparing them to go beyond their seniors, ensuring they have the skills to do it, and assisting them along the way. (4)______, teachers need to be forward-thinking, curious and flexible. They must be learners: learning new teaching methods, and learning alongside their students. Simply asking questions like “What will my students need dozens of years from now?” or “How can I help give them those skills?” can change teachers' (5)______, make them a leader, and bring about changes in the classroom, school and community

Rather than using books for research, students today are (2)______ to the Internet to download enormous amounts of data available online.