Question

It's high time that we students ______ even harder at our lessons as the national entrance examination is coming nearer.

A．work

B．will work

C．worked

D．have to work

Answer 1

C

試題分析：It’s high time that +…should do/did+其它 “是做…關鍵時候了”。That從句中要用虛擬語氣，特別注意should不可省。故選C.句意：隨著高考的臨近，是我們學生更加努力學習的關鍵時候了。
點評：虛擬語氣是高考必考點，用法較多，現將特殊的虛擬語氣結構介紹如下：
（1）虛擬語氣用在狀語從句中由as if 或as though引導的狀語從句表示比較或方式時，從句中的謂語動詞用虛擬語氣。動詞形式用動詞的過去式(be→were)或had+過去分詞。
如： The teacher treats the student as if he were her own child.
這位老師帶這位學生就象她的親生孩子一樣。
He speaks as if he had been to the United States.他說得好象他真的到過美國似的。
（2）在It is time (that) …; I’d rather(that)…句型中從句的謂語動詞常用動詞的過去式表示虛擬語氣，意思是“該干某事了，時間已經有些晚了”“我寧愿/希望”。
如： It is time that we did something to stop pollution.該我們做些什么制止污染的時候了。
It is time that Father picked up Lily from the kindergarten.該父親去幼兒園接莉莉的時候了。
I’d rather you told me the truth.我真希望你告訴我真相。
I’d rather I didn’t see you again.我寧愿不再見著你。