A bicycle is often more convenient than a car in towns.

在城镇骑自行车常常比开车更方便。

I prefer the latter, because I feel that it's much more convenient and cheaper.

我更喜欢后者，因为我觉得它更方便，更便宜。

I used to correspond with my friends by letters while now the Internet is more convenient.

我过去常写信与我的朋友联络，而现在有了互联网就更方便了。

The extension of communication technology make it more convenient for us to contact each other.

通信技术的传播使我们的联系更加方便。

Shopping online is more convenient and cheaper, and best of all, it can provide consumers with more choices.

网购更加方便便宜，更好的是，它能给消费者提供更多的选择。