Question 40: It is necessary to buy concert tickets in advance.

• A. Concert tickets must not be bought in advance.
• B. Concert tickets can’t be bought in advance.
• C. Concert tickets are unnecessary to be bought in advance.
• D. Concert tickets must be bought in advance. (This option is missing but would be the correct one)

Explanation: The original sentence implies that it is necessary to buy tickets in advance. The closest sentence should be something like "Concert tickets must be bought in advance," but among the given options, none is correct.

Question 41: It is said that someone invented the magnetic compass about a thousand years ago.

• A. Someone had been said to invent the magnetic compass about a thousand years ago.
• B. The magnetic compass is said to have been invented about a thousand years ago.
• C. A thousand years ago, someone said to have invented the magnetic compass.
• D. Someone was said to have invented the magnetic compass a thousand years ago.

Explanation: The correct transformation of the sentence is "The magnetic compass is said to have been invented about a thousand years ago."

Question 42: There is a variety of better ways of encouraging people to recycle more.

• A. This study finds that encouraging people to recycle more is better.
• B. People need to be encouraged to recycle more.
• C. There has to be better ways of encouraging people to recycle more.
• D. Recycling is encouraged in better ways.

Explanation: "There has to be better ways of encouraging people to recycle more" closely captures the original meaning.

Question 43:

• A. C... could be good business since...
• B. A... is likely to be...
• C. Healthy... can access...
• D. Due... to so much...

Explanation: None of these options is clear or complete, so it's not possible to choose the correct one.

Question 44: People have been greatly discouraged in recent years, so it is understandable to...

• A. Ancients... are...
• B. To be concerned... in...
• C. Uniting...
• D. The... of...

Explanation: Similar to Question 43, these options are incomplete or unclear.

Question 45: While there...

• A. Having... allows...
• B. You might be...
• C. The... responsible... with Great Britain...
• D. Some business...

Explanation: These options are incomplete or unclear.

Question 46: The reason...

• A. In Germany...
• B. In...
• C. There’s been...
• D. It hasn’t been...

Explanation: Without complete options, it's difficult to determine the correct answer, but "It hasn’t been..." seems the most plausible among the given fragments