gěi 

to; for

jiù 

exactly

nín

you(honorific for shi)

nǎ/něi

which

wèi

polite measure word for people

xiàwǔ

afternoon

shíjiān

time

wèntí 

question; problem

yào

will, be going to; to want to, to have a desire to

kāihuì

to have a meeting

shàngwǔ

morning

jié

(measure word for class periods)

kè

class;course;lesson

niánjí

grade in school

kǎoshì

to give or take a test; test

yǐhòu

after; from now on, later on

kòng(r)

free time

yàoshi

if

fāngbiàn 

convenient

dào

to arrive; to go to

bàngōngshì

office

xíng

all right; O.K.

děng

to wait; to wait for

bié

don't

keqì 

polite