课后答案
Unfamiliar Words
adapt apart from despite doubtful expectation greedy investigate norm
energetic plentiful
expectations (7) ideas about what would happen. Most students energetic said they felt more (8) active than before, and some greedy said they no longer felt (9) they wanted to eat more than they need at mealtimes. But it is (10) doubtful not certain that the majority of students will change their habits as a result of the experiment. More