grammar mix up

Over 20 models ​ (a)   produced in the past two years

• have been
• are
• were
• will have been

The house ​ (a)   ​ (b)   when I ​ (c)   ​

• was being
• painted
• arrived
• was
• had been

Next to Qur'an verses, there also exist ​ (a)   hadiths that ​ (b)   the ​ (c)   of Tahajjud Prayer. In various hadith, it ​ (d)   mentioned as Qiyamul Sabah, Salatul Sabah, and Tahajjud.

• a number of
• reinforce
• importance
• has been
• will be
• important

Tahajjud Prayer ​ (a)   entail a specific number of rak'ahs that ​ (b)   ​ (c)   ​ nor is there any maximum limit that ​ (d)   performed.

• does not
• must be
• performed
• may be
• do not
• will

intermittent fasting​ (a)   an eating plan that ​ (b)   between fasting and ​ (c)   on a regular schedule.

• is
• switches
• eating
• are
• was
• switch
• eat

Run your tongue over all the surfaces of your ​ (a)   . If your ​teeth ​ (b)   as smooth ​ (c)   glass, you've done a good job of brushing. If some areas still feel a bit rough, you should brush ​ (d)   again. Bacteria start ​ (e)   the layer of biofilm in as little as two hours after brushing.

• teeth
• feel
• as
• them
• forming
• like
• tooth
• feels
• it
• form

draw feet

Who is he? (his name and his profession)