technology

do wonders for

to have positive impact on sth

be one’s Achilles heel

be one’s weakness

can’t make head nor tail of sth

can’t understand sth

be completely hooked

enjoy very much

be slow on the uptake

be slow to understand sth

do sth at one’s own pace

do sth as fast / slow as they can

take in sth

understand or remember sth

in leaps and bounds

very quickly, very much

pass exam with flying colors

pass exam with very high results

be a real nuisance

be an annoyance

get on someone’s nerves

make somebody annoyed