单选题：They had talked only for a few minutes_________they found th

题目分类：英语三级A级
题目类型：单选题
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题目内容：

They had talked only for a few minutes_________they found they were of different opinions． A．unless
B．while
C．before
D．once

参考答案：

答案解析：

What do family doctors often do? They_______________________

What do family doctors often do? They_______________________the health of everyo

分类：英语三级A级题型：单选题

How many kinds of doctors are there in the US7______________

How many kinds of doctors are there in the US7__________________________________

分类：英语三级A级题型：单选题

以记账凭证为依据，按有关账户的贷方设置，按借方账户归类的有（　　）。

以记账凭证为依据，按有关账户的贷方设置，按借方账户归类的有（　　）。

分类：英语三级A级题型：单选题

以下应计入借方的是（　　）。

以下应计入借方的是（　　）。

分类：英语三级A级题型：单选题

在Windows中，启动多个应用程序，可以通过（　　）在应用程序之间切换。

在Windows中，启动多个应用程序，可以通过（　　）在应用程序之间切换。

分类：英语三级A级题型：单选题