________ hard you try,it is difficult to lose weight without cutting down the amount you eat.(2012·湖南)
He __________ here on time next Tuesday.
Whatever they end up doing, they __________ themselves a great deal.
—Do you remember the speech contest tomorrow? —At this time tomorrow I __________ a talk.
I __________ a meeting at 4 o'clock tomorrow afternoon.
—What are you doing, Jack? — Make a model plane. I __________ it in the science class at 10 o'clock tomorrow morning.