最让我困惑的是他昨天为什么没有来开会。
The way a lot of researchers use to study anxiety is by ______.
When the mother opened the door, what did she find?
She found that the hall way was ______.
If he (take)______my advice at that time, he would have got the job he applied for.
Working from home is flexible and beneficial not only to the employees but also to the (employ)______.
In many commercial businesses,______(计算机已在很大程度上替代了) paper work because they are fast, flexible and reliable.