Answer and explanation

Correct answer: A. always

「いつも」 means always.
Answer: always.
Why not the others: at last, finally: that is the meaning of 「やっと」. of course: that is the meaning of 「もちろん」. a lot: that is the meaning of 「たくさん」.

Practise more Everyday words.

Free questions with an explanation for every one, and full timed JLPT Practice (N5 and N4) - Japan mock tests.