Choose the correct variant. We usually.....hard at our English lessons.

{"correct_variant"=>"work", "explanation"=>"The sentence requires the simple present tense because it describes a habitual action (something that happens usually). The correct verb form to use with 'We' is the base form of the verb, which is 'work'.

'Worked' is the past tense and is not appropriate here.
'Works' is for the third-person singular (he, she, it), not for 'we'.
'Are working' is the present continuous tense, implying an action happening at the moment, rather than a usual action."}