Add punctuation: Before wide masses of soldiers acquire the experience of well choosing and selecting commanders the revolution will be beaten by the enemy which is guided in the choice of its command by the experience of centuries
A: Before wide masses of soldiers acquire the experience of well choosing and selecting commanders, the revolution will be beaten by the enemy which is guided in the choice of its command by the experience of centuries.

Add punctuation: This attractive BERNINA sewing machine bag offers plenty of room and protects your sewing machine and accessories even when traveling
A: This attractive BERNINA sewing machine bag offers plenty of room, and protects your sewing machine and accessories even when traveling.

Add punctuation: For the first cause you may try upgrading your Windows operating system to a newer version The second scenario can be solved by installing an anti virus program to your computer and using that program to remove viruses
A:
For the first cause, you may try upgrading your Windows operating system to a newer version, The second scenario can be solved by installing an anti virus program to your computer and using that program to remove viruses.