⑴____A. always B. often C. fruit
⑵____A. vegetable B. first C.fruit
⑶____A. eight B.three C.first
⑷____A. his B. your C.I
⑸____A. drink B.sport C. eat
到了冬天,有些树的叶片会脱落,而有些仍然郁郁葱葱,这表明( )
二次大战以来,美国经济一直居世界首位,该国能够保持经济长久不衰的最主要原因是( )