If you travel around the world, you will be surprised at ________.
Only after a year ______ to see the results of my work.
My family like to travel. Mother prefers to take a bus to travel, while father ______ to travel.
We'll never give up working on the experiment (实验), ______ difficult it is.
After class, students ______ clean the chalk off the blackboard.
The fish on the table ______. I want to eat it right now.