It is implied in the passage that()

• A、all high-school students take the same courses

• B、every high-school student must take some practical ability training courses

• C、every public school offers the same academic subjects

• D、the subjects every student takes may vary

Muren dedicated himself to the improvement of old technology. () 

• A、Right

• B、Wrong

• C、Not mentioned

American Roads

The United Stares is. well-known for its network of major high ways designed to help a driver get from come place to another in the shortest possible time. Although these wide modern 31___ are generally smooth and well maintained. with few sharp CT and straight sections,a direct route is not always the most 32___ one. Large highways often piss by scenic areas and interesting small 33___Furthermore.these highways generally connect large urban centers,which 34___that they become crowded with heavy traffic during rush hours,when the "fast,direct" route becomes a very slow route,

However, there is almost always another route to take 35___ you are noting hurry.Not far from the 36___ news “superhighways" .there are often older.37___ heavily traveled roads which go through the countryside. Some of These are good two lane roads others are uneven roads curving through the country. These secondary routes may go 38___steep slopes, along high cliffs, or down frightening hillside to towns 39___in deep alleys. Through these less direct routes.longer and slower,they generally go to places 40___the air is clean and scenery is beautiful,and the driver may have a chance to get a fresh.clean view of the world.

A. Less

B. Up

C. Enjoyable

D. Relatively

E.means

F. Roads

G. lying

H. Through

I.which

J.if

K. where

L. towns