维生素A的特异性缺乏症是()
A.骨骼变形
B.繁殖障碍
C.夜盲症
D.干眼病
参考答案:C
老鼠——耗子
A.野猫——狐狸
B.乌贼——墨鱼
C. 袋鼠——松鼠
D. 蟑螂——蜘蛛
“ Isn’t that Tom playing basketball?” “ It ______ be; he fell off the ladder yesterday and got badly hurt.”
A.mustn’t
B.would rather not
C.couldn’t
D.wouldn’t