5. Some cyclists make the assumption that traffic laws do not apply to them, …
make the assumption that =assume that… = think that …
apply to 适用于 The rule _______ everyone. 此规则适用于任何人
apply A to B 把A运用于B
apply to sb, for sth. 向某人申请某事
Apply oneself to sth. 致力于某事
6. it is up to all of us roads users to make sure that we avoid accidents by paying attention to road safety.
It is up to sb, to do sth. 由某人决定做某事 It is up to you to decide what to do next.
Be up to sth. 多达成，直到，可与某物相比，正在忙于做某事
