在基坑或沟槽开挖时，对于松散、湿度大的土可用（）支撑。

He explained everything over and over again ______anyone should misunderstand him.

A．since

B．when

C．lest

D．as if

A. since

B. when

C. lest

D. as if

[A] since

[B] when

[C] lest

[D] as if

When he explained it again and again, the students' patience______.

A．ran over

B．ran on

C．ran out

D．ran off

When he explained it again and again, the students' patience ______.

A．ran over

B．ran on

C．ran out

D．ran off

When he explained it again and again, the student's patience ______ .

A．ran over

B．ran on

C．ran out

D．ran off

When he explained it again and again, the student's patience ______ .

A．ran over

B．ran on

C．ran out

D．ran off

Why is anyone who crosses the finish line a winner？

A．Because he is over the fellow runners.

B．Because he is over former runners.

C．Because he is over his own body.

D．Because he wins the prize.

What he emphasized over and over again was that, ___________(不管多么困难), they should never retreat even for an inch.

A．A.did he know

B．B.he know

C．C.did not he know

D．D.did not know he