
Verb Tenses
Authored by tamara paez
English
8th Grade
Used 6+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Twenty-three organic substances have been selected as representative of classes of compounds usually encountered in aqueous systems.
seleccionaron
han seleccionado
han sido seleccionadas
tienen que seleccionar
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phenolic compounds were selected based on their common occurrence in waste streams
seleccionaron
han seleccionado
han sido seleccionados
fueron seleccionados
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The researchers selected two compounds that proved to be efficient even in low concentrations and ran computer modeling
seleccionaron
fueron seleecionados
seleccionado
seleccionan
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Synthesis of several hydrophobic ionic liquids might be selected as good candidates for degradation of hydrophobic volatile organic compounds in a two-phase partitioning bioreactor.
han sido seleccionados
podrían seleccionar
fueron seleccionados
podrían ser seleccioandos
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In this approach, the candidate plants are being selected on the basis of observation, description, and even some experimental evaluation.
son seleccionadas
están seleccionadas
han sido selecciondas
están siendo seleccionadas
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Naturally, the electrogenerated reactive species have to be selected from the counter electrode compartment
han sido seleccionados
tienen que ser seleccionado
tienen que seleccionar
fueron seleccionados
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Manufacturers will select from a list of options the most accurate classification describing a material.
pueden seleccionar
seleccionarán
seleccionarían
han seleccionado
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