French language Q&A Forum

I echo the comments below regarding this lesson lacking clarity. 

The explanation of when it IS appropriate to use 'devoir' is missing and I find it easier to just memorise the correct answers rather than try to answer them using knowledge of the grammar rules.

I've been marked wrong for using - Il est dix-neuf heures et demie. - for 7.30 PM

But it's shown as acceptable in the lesson above.

Why?

In this lesson one of the questions was "Marie a manqué l'école ". I would have answered this with "Marie (has) missed school." Of course this answer wasn't available and the right answer was "Marie didn't go to school." Wouldn't this be easier to understand if written like " Marie n'est pas alleé à école ?" or are all similar events ( not going/doing somewhere/something) expressed by  "Manquer de ?" Thanks,  Heather.

Est-ce que la bilingue histoire est disponible, s'il vous plaît? 

I would be grateful for a clarification of the following:

In a sentence such as: Frank writes fast but Olivier writes as fast as him. "Frank écrit vite mais Olivier écrit ________ lui": why do we use the adjectival "aussi vite que "instead of the adverb "autant vite que"?