单选题 That man looks familiar to me. He reminds _______ Dr. Richards.

单选题 Although they are twins, they have nothing in _________.

单选题 We've ________ paper and ink. Ask Mr. Howard to lend us some.

单选题 Nancy works in a shop and _______.

单选题 Modern machinery _______ been installed in this newly-built factory.

单选题 Each new way of looking at a situation ________ our understanding and makes it easier to discover new possibilities.

单选题 We offered him our congratulations _______ his passing the college entrance exams.

单选题 Every means _______ been tried to solve the difficult problem.