Arriving late, he quietly sat at the back,______ his book and began to write. [ ]

A. took off

B. took out  

C. took away

D. took down

UT型线夹的型号是UT，U表示U形，T表示可调。其不同型号适用的范围是（）。

A.UT-1适用于GJ-25～50钢绞线

B.UT-2适用于GJ-70钢绞线

C.UT-3适用于GJ-100～120钢绞线

D.UT-1适用于GJ-100～120钢绞线

E.UT-1、UT-2、UT-3型线夹适用于各种型号规格的钢绞线