学以致用

Replace the underlined words with the correct form of the words and expressions in the box.

1. Early sailors used tree logs that were empty in the middle as boats.

2. Most explorers didn’t believe the Earth was a ball until Magellan first sailed all-round the Earth in the early 1500s.

3. Ship hulls need to be strong and waterproof both on the sides and on the bottom.

4. An interest in exploration has to come together with advances in technology to advance the science of navigation.

5. We tend to credit one person with a major invention or discovery, although in fact that person was helped by many people who lived and worked in the same areas before.

6. The Spanish Armada attempted to invade England in 1588, but they were stopped when the English fleet commanded by Sir Francis Drake came and disrupted their plans.

 

教师解析

1. hollow

2. sphere

3. underneath

4. converge

5. predecessors

6. intervened