— What did your parents think about your decision?

— They always let me do _____ I think I should.

[     ]

A. when

B. that

C. how

D. what

下列有关肢端肥大症的叙述，不正确的是（）

A.清晨空腹血浆（清）GH水平检测常低于正常参考值

B.血浆（清）IGFBP-3水平常显著降低

C.血浆（清）IGF-1水平常显著降低

D.药物刺激试验可用于诊断

E.高血糖抑制试验可用于诊断