Jack has _____bags.[ ]
A. second
B. twenty-five
C. three-twenty
D. first
答案：B
― Why was he late again?
― He arrived at the station late. , he missed the early train.[ ]
A. However
B. Therefore
C. Because
D. Though
一参加集训新兵，近1个月来出现右小腿肿痛，X线示右胫骨中上1/3横形骨折线，有骨痂形成，未见明显移位。最可能的原因是（）
A.直接暴力
B.间接暴力
C.积累性劳损
D.肌肉牵拉力
E.骨骼疾病
