They cancelled all flights because of fog.

A. The meeting had to be postponed because of illness.

B. The meeting had to because of illness be postponed.

C. The meeting had to be postponed by them because of illness.

D. The meeting because of illness had to be postponed.

A. Congress is going to be held next year in San Francisco.

B. Congress in San Francisco is going to be held next year.

C. Next year's congress is going to be held by them held next year.

D. Next year's congress is going to be held in San Francisco

A. A new highway is being built around the city.

B. A new highway is being built around the city by them

C. A new highway around the city is being built.

D. Around the city a new highway is being built.

A. The date of the meeting has been changed

B. The date of the meeting has been changed by them

C. The meeting has been changed the date

D. The date of the meeting ahs changed

A. The football match shouldn't have been played in such bad weather.

B. The football match shouldn't have been played by them in such bad weather.

C. The football match shouldn't be played in such bad weather.

D. The football match shouldn't have played in such bad weather.

A. A new hospital has been built near the airport by them.

B. A new hospital near the airport has been built.

C. A new hospital has been built near the airport.

D. Near the airport a new hospital has been.

A. An electrical fault could have been caused by the fire.

B. An electrical fault could have caused the fire

C. The fire could have been caused by a electrical fault.