【练习】用括号内所提供词的适当形式填空
1) We’ll take a voyage of _________. (explore)
2) Columbus discovered America but did not ________ the new continent. (explore)
3） They’re making ___________ medical tests. (explore)
4） Television provides _________ entertainment. (universe)
5） There are lots of stars in the ________. (universe)
6） Don't judge by __________ can be misleading. (appear)
