Pipes may need _______ against the cold. 

the aircraft will continue to be ________ in France.

It's nor certain how the fire started, but it might _______ by an electrical fault. 

Please pack this equipment very carefully. I don't want it to ______ .

Two hundred people ______________ due to the expansion of company.

Neal ________ as a mechanical engineer at the company for more than 10 years. 

He _________ to the presentation of the launch of the new spacecraft 

The local authority  ____________  to

introduce a flood control system.

We must complete the work within two months, so at present we  __________  24 hours a day.

They  _______ for the launch of the new car model for a few months.