路堑开挖前,应先____并接通出水口。宜分层开挖,每挖一层均应设置排水纵横坡。
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土方挖运必须____顺序放坡进行,不得____,严禁掏底开挖,弃土下方和有滚石危及范围内的道路应设____,作业时坡下严禁通行。
If you can set aside time in each day to do this,__life will be different.
A. you
B. your
C. yours
D. yourself
Our tutor makes __think what role we should play in this program.
A. we
B. our
C. ours
D. us
Some information should be offered such as your name, telephone number and __.
A. majoring
B. major
C. majory
D. majored