给下列加粗字注音。
迁徙（ ） 憔悴（ ） 惶惑（ ）
xǐ qiáo cuì huáng
The main problem is whether ______ abroad. [ ]
A. work
B. works
C. working
D. to work
X线管的靶面材料通常是()
A．铁
B．钨
C．金
D．铜
E．锌
n
problem is whether ______ abroad. [ ]