Your water bill is ________ to be paid. [ ]
A. ashamed
B. due
C. unfit
D. tough
答案:B
I never ____________ TV.[ ]
A. watches
B. watch
《煤矿安全质量标准化》规定,综采工作面相邻液压支架顶梁平整,不应有明显错茬,错茬不应超过侧护板高的()
A.1/3
B.2/3
C.3/4
D.4/5