to be effective; to take effect; to work; to function well; to be possible (to do, use, etc.); to be able to
student in a lower grade; underclassman
to surround; to crowd around
lively; vigorous; energetic; full of (energy, appetite, curiosity, etc.); brimming with
curiosity; inquisitiveness
he; she; this; this one; Hey, you!; You bastard!
20 years old; (arch.) twenty
in the morning; during the morning
self-study; teaching oneself; studying by oneself (at school) while the teacher is absent
near; close; close (in time); soon; close (relationship); friendly
low (level, value, price, etc.)
upper grades of primary school (sixth, fifth, and sometimes fourth grades)
business; task; use; purpose; for the use of ...; used for ...
variety; kind; type; counter for kinds, species, etc.
question collection; problem collection; problem set; workbook
each (person); everyone; individual; respective
to untie; to unfasten; to unsew; to unstitch; to solve; to work out; to dispel (misunderstanding, etc.)
whenever necessary; as needed; as required; at any time; at all times
question; inquiry; enquiry
whole; entirety; whatever (is the matter)
to occupy; to hold; to account for; to make up; to take up
middle grades of primary school (third and fourth grades)
usual; ordinary; normal; regular; general; common
teacher's desk; teacher's lectern
to change completely; to switch (to); to shift (to another mode)
especially; above all; inter alia; among others
to be noticeable; to notice; to catch one's eye
all; completely; totally; entirely; thoroughly
forgetting; lapse of memory
that sort of; that kind of; like that; such; so
to get better; to get well; to recover (from an illness); to be cured; to be restored; to heal
blood; blood; ancestry; (the) blood; feelings
to vomit; to throw up; to emit; to send forth; to give (an opinion); to make (a comment)
television; TV; TV program; TV programme; TV broadcast
troublesome; annoying; complicated
I'm sorry; my apologies; may I come in?; permission; leave; dismissal
horizontal (as opposed to vertical); lying down; side-to-side (as opposed to front-to-back); width; side (of a box, etc.); beside
to hang (something) on (something); to throw on (clothes); to hook; to catch; to cheat; to evade payment; to drink (alcohol)
to raise one's voice; to shout; to yell; to speak up (e.g. in protest); to speak one's mind
to leave behind; to put off; to postpone
luckily; blessedly; fortunately
to chase; to run after; to pursue
to return; to come back; to turn over; to become extremely; to become completely
opposite effect; adverse effect; backfiring
to arrive at (e.g. a decision); to reach (a stage); to lead to (a place); to get to; in the extreme case of; (arch.) to come