Questions 22-25 are based on a passage about London taxi drivers. How long does the training period last

A．The Churchills were touched by the goodwill of the gift senders.
B．Angry as Churchill was about his image in the portrait, he was diplomatic enough when making public remarks about it.
C．Despite his dislike of the portrait, Churchill couldn’t help revealing his love of modern art on public occasions.
D．Out of politeness Churchill deeply concealed his true feeling about the present in public.

A．The existence of life needs a steady supply of heat and light.
B．A smaller planet would hold too much of its atmosphere.
C．Life may arise on the planet where the proper conditions exist.
D．The existence of life needs the right amount and kind of atmosphere.