Question

They __ __ salt, water and iron to the beaker recently.

A) adding
B) have add
C) has add
D) has added
E) have added

Answer 1

Respuesta:

They have added salt, water and iron to the Beaker recently.

Explicación:

El Presente Perfecto con Pronombres en Plural como They se forma con Have + Verbo en Participio Pasado.