Questions 135~138 refer to the following passage. New technology is making cash    135    and turning us into a cashless society. Manyof us use credit and debit cards, and    136    payments using tap-and-go cards arebecoming popular. Though this can put you at risk of fraud, they are capped andbanks cover any losses. Chip and PIN technology has reduced fraud and speeded uptransactions. Wearable tech is another option    137    those who find getting theirbankcard out too much trouble. It is    138    for people who don't want to use theircard, phone, or watch and is particularly useful for small-valued goods.
【題組】135.
(A) obscure
(B) obsolete
(C) observant
(D) obsessive