专项练习延续与非延续性动词( D ) 1.When he arrived at the bus stop, the bus _ for 20 minutes.A. has leftB. had leftC. has been away D. had been away( C ) 2. I _ the League for 5 years so far.A. joinedB. have joinedC. have been in( A ) 3.The factory _since the February of 1988.A . has been openB. has openedC. was openD. opened ( B ) 4. Mary and Rose _friends since they met in 2000.A. have madeB. have beenC. madeD. have become( B ) 5.You mustn
