surely, certainly

with a startled heart

to be startled, receive a shock / to skip a beat

staggered shelves (two shelves at different heights, each one extending from one wall while not touching the other wall, but mutually joined in the middle with a vertical segment)

without a doubt; for sure

certainly; without a doubt

succeed / be successful in life

success / success in life, achievement in the world

inappropriate; out of place

inappropriateness; being out of place