The old lady had two clever sons, ____ did a good job in the 2010 National College Entrance Exam, though.
We sailed for 2 months and finally the land was _____
____________ the situation, Charles Yerkes undertook ____________ the system in 1902 by obtaining ownership of many different lines.
____________better ways for digging tunnels__________, the first railway tunnel under the River Thames was dug in 1884.
The initial tunnels were just ___________ the surface of the ground. People were transported in carriages, which were ___________ the narrow tunnels by steam engines.
-Why ________ it rain at weekends? -Never mind, let’s watch TV at home.