__________ there was danger ahead, the girl walked on.
| A．Known not | B．Not known | C．Knowing not | D．Not knowing |
____________ the situation, Charles Yerkes undertook ____________ the system in 1902 by obtaining ownership of many different lines.
| A．Seeing, improving | B．Seen , improved |
| C．To see, to improve | D．Having seen, improving |
____________better ways for digging tunnels__________, the first railway tunnel under the River Thames was dug in 1884.
| A．As , developing | B．With, developed |
| C．As , were developed | D．With, development |
The initial tunnels were just ___________ the surface of the ground. People were transported in carriages, which were ___________ the narrow tunnels by steam engines.
| A．under, broken through | B．below, put through |
| C．of , gone through | D．beneath, pulled through |
-Why ________ it rain at weekends?
-Never mind, let’s watch TV at home.
| A．can | B．would | C．shall | D．must |
___________ so delicious, the soup is very popular with the kids.
| A．Tasted | B．Tasting | C．To taste | D．Taste |