单选题：In the experiment we kept a watchful eye __________ the deve

题目分类：专四
题目类型：单选题
查看权限：VIP

题目内容：

In the experiment we kept a watchful eye __________ the developments and recorded every detail. A．in
B．at
C．for
D．on

参考答案：

答案解析：

不良品德如何矫正？

不良品德如何矫正？

分类：专四题型：单选题

下列极限中，不正确的是（　　）

下列极限中，不正确的是（　　）A． B． C． D．

分类：专四题型：单选题

What is the new cause of the evangelicals?

What is the new cause of the evangelicals?A．Fighting against abortion. B．Warning

分类：专四题型：单选题

本文关于清风、明月、江水的景物描写有何作用?

本文关于清风、明月、江水的景物描写有何作用?

分类：专四题型：单选题

Where did the mine companies operate according to the news i

Where did the mine companies operate according to the news item?A．In 28 states,

分类：专四题型：单选题