1.Microwave ovens are generally more costlier than common ovens. _______

2. It is possible that some old paintings were once bright and more _______
colorful than they are now.

3. There are few electronic applications likely to raise fears regarding _______
future employment opportunities than robots.

4. Most wine from Switzerland is more inferior to wine from France. ______

5. By opening vast areas of un occupied land for residential expansion,
the ominibuses, house railways, commuter trains, and electric trolleys
pulled settled regions outward two to four times as distant from city
centers than they were in the premodern area. _________

1、costlier - costly
此句costly是形容词，意思是昂贵的。它的比较级形式是more costly。costlier是错误的形式，须改成costly。

2. bright - brighter

3. likely前加more
此句的意思是：很少有电子应用软件能够像机器人那样引起人们对未来就业机会的担忧。
此处是 more likely … than 比较结构

4. more - /

有些含有比较意义的形容词，不能与more, er, than连用的，如：preferable to,superior to=better than, inferior to劣于，prior to=before, second to仅次于, inferior to等。

5. than - as