He said he ____ for 20 years by this summer.
A. will have been teaching
B. could have taught
C. would have been teaching
D. should have been teaching
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It’s raining hard outside. You ____ stay here for the night.
A. might well
B. might as well
C. are justified
D. might just
混凝土搅拌机有( )。
A. 强制式搅拌机
B. 重力式搅拌机
C. 自落式搅拌机
D. 剪切式搅拌机
钢筋的连接有( )等方式。
A. 浆锚连接
B. 绑扎连接
C. 焊接连接
D. 机械连接
钢筋电弧焊的接头有( )。
A. 错接焊接头
B. 帮条焊接头
C. 搭接焊接
D. 剖口焊接头