1.   A macro virus spreads by infecting Microsoft Word or Excel documents.

2.   Once nasty enough, this virus would start spreading by more conventional means.

3.   They are small grains with a little wing attached on each side, which helps them spread by the wind.

4.   The disease spreads by sexual contact between infected animals.

5.   He says all the stuff about storming off to Paris and missing practices were rumours spread by Wilko.

6.   Although city firefighters and teams from other petrochemical plants were standing by, Doyle said, Sterling crews kept the leak from spreading by spraying it with water.

7.   Although the discovery was made two years ago, it has not been reported in scientific journals, and information about it has spread mainly by word of mouth.

8.   Because the rumor was spread by Thomas Hanley, the analyst who has made a career predicting dozens of takeovers that have dominated the banking industry.

9.   Because some sweat is always present on skin, growing the virus would greatly strengthen the case that Ebola virus could be spread by touching skin.

10.   Bluegrass spreads by sending runners along the surface of the ground so it naturally fills gaps.