it's OK to ...; it's best to ...; it's alright to ...
occasion; time; circumstances; (in) case (of); when
insincere smile; ingratiating smile; polite smile; forced smile
with; by; because of; on account of; on (a day, date); at (a time); adds emphasis to preceding word
as a matter of fact; by the way; to tell you the truth; to be honest; frankly; actually
perfect; complete; flawless
awfully; frightfully; desperately; violently; unduly; extremely
feeling refreshed; feeling relieved; neat; tidy; frank; open-hearted; completely
anxiety; uneasiness; worry; apprehension; fear; insecurity
kind; gentle; considerate; generous; friendly; nice
party (of people); set (of people); clan; family; fellow
sweet-tasting; sweet; fragrant (smelling); sweet (music); lightly salted; light in salt; indulgent
optimism; taking an optimistic view
deeply; keenly; severely; intently; carefully; closely
to pass (of time); to elapse
counter for (school) periods; nth period
lesson; class; teaching; instruction; classwork; schoolwork
to be hit; to strike; to touch; to be in contact; to be equivalent to; to be applicable; to be right on the money (of a prediction, criticism, etc.)
another time; again; over again; formally; especially; intentionally
sigh (of grief, disappointment, etc.); grieving; lamenting; deploring
even at the best of times; already; (even) under normal circumstances; in addition to; as it is
environment; surroundings; circumstances
tension; strain; tensions (between countries, groups, etc.); tonus; muscle tone
at least; at most; (even) just
easy; easygoing; carefree; happy-go-lucky; optimistic; leisurely
dear (old); fondly remembered; beloved; missed; nostalgic
faint; dim; weak; poor; wretched; meagre
to breathe out; to breathe; to tell (a lie); to use (foul language); to vomit; to throw up
to recall; to remember; to recollect
beginning; outset; first; onset
homeroom; form room; form class
awkward; clumsy; stiff; crude; unrefined; constrained
atmosphere; mood; a certain air; presence; (Earth's) atmosphere
classroom; lecture room; department (in a university); class; lessons; school (for a particular discipline)
pupil; student; schoolchild