By cutting down trees we _____ the natural home of birds and animals.

单项选择题Several experts have been called in to plan _____ for boating, tennis, refreshments and children’s games in the projected town park.

单项选择题Grain production in the world is _____, but still millions go hungry.

单项选择题Of course, most immigrants did not get rich overnight, but the _____ of them were eventually able to improve upon their former standard of living.

单项选择题Bacteria are sometimes _____ too small to be seen without a microscope.

单项选择题The old gentleman was a very _____ looking person, with grey hair and gold spectacles.

单项选择题I am sorry I have no time at present to _____ more detail or give you an account of other cities of interest.

单项选择题The crippled boy proudly walked with a _____ to the platform to join the actors.

单项选择题When I got out of the car and walked about among them, _____ one old man who shook his head disapprovingly, they all began to cheer.

单项选择题It is believed that the authorities are thinking of _____new taxes to raise extra revenue.

单项选择题Which of the following tag questions is INCORRECT