1.They ___B____ the trip until the rain stopped.

A. continued B. didn't continue

C. hadn't continued D. would continue

until是前面和后面用一般过去是和过去完成时都对

但是我们在一般情况下两个都用一般过去时

2.The local peasants gave the solders clothes and food without which they __A___ of hunger and cold.

(without 在这里表示条件, 你知道吗?)

A. would die B. will die C. would be dead D. would have died

这是关于虚拟语气的题

3.It was not until then that I came to know that the earth _D___around the sun.

A. moved B. has moved C. will move D. moves.

只要是真理都用一般现在时

It was that 是强调结构

分析句子时后半句改为

I didn't come to know that the earth around the sun until then.

until then 是在那个时候之前

His father did not leave until he returned home.

变成强调句形式 : It was not until he returned home that his father left.

I don't get up until lunch time.

变成强调句形式 : It is not until lunch time that I get up.

4. When all those present(到场者)_D___he begin his lecture.

(重点题)

A. sit B. set C. seated D. were seated

seat 做动词的时候两种情况