Section 1 : 上期复习

1. The work in those two offices is equivalent, but the pay is different.

2.  The office was in close proximity to Celia's house; however, it was a long drive in the heavy traffic.

1. 相同的，相当的；等价物
     
2.  接近

Section 2  请用同义词填空

1.  The office was in close proximity to Ann's house before she moved; now she lives an hour's drive away.

How do you know that proximity means  ______? What signal was used for contrast?

2.  A signature on this form was previously optional; now it is required.

How do you know that optional means  _________? What signal was used for contrast?