下列药物的碱性溶液，加入铁氰化钾后，再加正丁醇，显蓝色荧光的是

A．维生素K₁
B．维生素B₁
C．维生素C
D．维生素D
E．维生素E

(2013·高考天津卷)I had hoped to take a holiday this year but I wasn’t able to ________.

A．get away

B．drop in

C．check out

D．hold on