Considering language use in the text, it’s correct to say:

“If there’s anyone in this world I do trust, it’s my mother!” (6th picture)
The verb do in this sentence is being used
SCHULZ. Peanuts. Speak up. São Paulo: Peixes, 2006. p. 49.
There are _________electric vehicles registered on German roads at present.
According to the text, the alternative that suitably completes this sentence is
EVANS, Stephen. Disponível em: <www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2011/05/110518_witn_electric_cars_page.shtml>. Acesso em: 2 jun. 2011.
EVANS, Stephen. Disponível em: <www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2011/05/110518_witn_electric_cars_page.shtml>. Acesso em: 2 jun. 2011.
TEXTO:
BRYANT, Nick. Record blow for teenage sailor. Disponível em:<www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2010/05/100505_witn_sailing.shtml>. Acesso em: 5 jun. 2010.
LONG, Gideon. Earthquake science. Disponível em: <www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2010/03/100405_witn_earthquake_science.shtml>. Acesso em: 6 jun. 2010.
LONG, Gideon. Earthquake science. Disponível em: <www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2010/03/100405_witn_earthquake_science.shtml>. Acesso em: 6 jun. 2010.
SCHULZ. Peanuts. Speak up. São Paulo: Peixes, 2006. p. 49.
TEXTO:
OXENDEN, Clive; LATHAM-KOENIG, Christina American English File,
MultiPack 4A, 2010. p.51
TEXTO:
Multitasking harmful to productivity
TEXTO:
Can animals predict natural disasters?
CAN, animals predict natural disasters? Disponível em: <http://english.pravda.ru/science/tech/8178-1/Adaptado. Acesso em: 20 dez.2009.