大学英语四级

saint save scale schedule scholarship scope scratch screen secure security seemingly seize seldom selection selective selfish senior sensible sensitive sentence separately session setting severe shade shock shortcut showmanship sideways sightseeing signal signature significant similar simplicity simplify site situation skyrocket slave slightly slippery smooth snack soar socialize solely solid solution solve sophisticated source spare specialize specific specify sphere sponsor spontaneous spread squeeze stake stale standardize standpoint startle startup statistics status steady steal steep steer stereotype sticky stimulate stir stock strain strategy stress stressful strict structure struggle subdivision submit subsidize substantial substitute suffer sufficient superficial superior supervision suppose surf surpass survey survival suspect sustain sustainable swallow sway swift switch symbol symbolize sympathy symptom synthetic