15. Not until the game had begun __ at the sports ground.
A、should he have arrived
B、would he have arrived
C、did he arrive
D、had he arrived
26.
A、being
B、be
C、was
D、were
I.Phonetics ( 5 points)Directions:In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and iden-tify the one that is different from the others in pronunciation. Mark your answerby blackening the corresponding letter on the Answer Sheet.