Question

________is your class teacher？My class teacher is of average height．

1. A.
   Who
2. B.
   How old
3. C.
   How high
4. D.
   How tall

Answer 1

D
分析：is of average height(处于平均高度)，所以是问“身高”，问“人”的身高时应该用how tall，而问“物”的高度时用how high(但对植物也用how tall，对建筑物可以用how tall也可以用how high)(延伸)How old is he？＝What's his age？／How long is the wood？＝What's the length of the wood．？