If you meet trouble, you can ______ your friends ________ help.
When you reach a new place, you’ll see a lot of useful __________ about that place _________ your screen.
I like to travel on high-speed trains because they are usually . While planes are behind schedule (晚点) too often.
----What a nice bike! How long ____ you ____it? ----- Just two weeks.
When his wife died, he lived ______; his lovely pet dog made him feel less ______.
All the students know shouting at the elderly is impolite.