How many new Ennglish words had you learnt before you started this unit ? Помогите...

Put in: learn or study.
a)You’ll never ... a foreign language without ... grammar rules.
b)The head of expedition ... the map carefully and then left the room.
c)It takes time to ... how to do things quickly and correctly.
d)How many new words have you ... by heart at this lesson?
e)What do you think of... (+ -ing) abroad?