a trial period 一段试用期

he’s on trial for murder.他因涉嫌谋杀罪而受审。

She will stand/go on a trial for fraud.她因涉嫌诈骗将受到审判。

Children learn to use computer programs by trial and error. 儿童们通过反复试验，不断摸索，学会运用计算机程序。

2.prove (proved, proved) or (proved, proven) 1)vt. 证明

[~ sth (to sb) ] They hope this new evidence will prove her innocence. 他们希望这个新证据会证明她无罪。

[~ (that)] This proves (that) I was right. 这证明我是对的。

[~ +宾语+ adj] She was determined to prove him wrong. 她决心要证明他错了。 (2)系动词：证明是，显示是

[V+adj/n] Perhaps this book will prove (to be) useful. 或许这本书会证明有用的。 [V +to be] The promotion proved to be a turning point in his career. 这次提拔证明是他事业的转折点。

重难点句子分析

1. In a trial, a judge must decide which eyewitnesses to believe and which not to believe.

这是以“疑问词+不定式”结构作宾语的简单句。这种结构在句中可作主语，宾语和表语。

When to start has not been decided.

I don’t know whether to accept his invitation or not. The question is how to carry out the plan.

2. whether the eyewitnesses …… , which must be facts 1) care about 在乎，在意，关心

She thinks only of herself, she doesn’t care about other people.. 2) rather than 而不是，与其说……不如说……

They were shouting rather than talking.