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.