【单选题】

Cheques have largely replaced money as a mean s of exchange, for they are widely accepted everywhere. Though this is very (1) for both buyer and seller, it should not be forgotten that cheuqes are not real money: they are quite (2) in themselves.A、shop-keeper always runs a certain (3) when he accepts a cheque and he is quite (4) his rights if, (5) , he refuses to do so.

People do not always know this and are shocked if their good faith is called (6) .An old and very wealth friend of mine told me he had an extremely unpleasant (7) . He went to a famous jewellery shop which keeps a large (8) of precious stones and asked to be shown some pearl necklaces.After examining several trays, he (9) to buy a particularly fine string of pearls and asked if he could pay (10) cheque. The assistant said that this was quite (11) , but the moment my friend signed his name, he was invited into the manager’s office.
The manager was very polite, but he explained that someone with (12) the same name had them with a (13) cheque not long age. He told my friend that the police would arrive (14) any moment and he had better stay (15) he wanted to get into serious trouble. (16) , the police arrived soon afterwards They apologized to my friend for the (17) and asked him to (18) a note which had been used by the thief in a number of shop. The note (19) : "I have a gun in my pocket.Ask no questions and give me all the money in the safe." (20) , my friend’s handwriting was quite unlike the thief’s.
A、in difficultyB、in doubt C、in earnestD、in question