She suddenly burst into tears.

He began doing his work immediately.

He suddenly started cleaning the room.

He voiced his feelings out loud.

He is always teasing his younger sister.

He had the courage to confess his mistakes.

He contracted brucellosis after returning from a trip abroad.

The use of thermonuclear weapons could potentially cause a major disaster for all of humanity.

Zika fever is an infectious disease transmitted by mosquitoes.

This material has the ability to absorb the heat of the sun.