教程列表：

able

above

accident

across

adult

advantage

afraid

again

age

ago

agree

air

allow

almost

along

alone

along

already

although

among

angry

angry

another

april

arm

army

around

arrive

ask

august

autumn

answer

ant

appetite

believe

begun

beginning

before

before

been

beef

bee

because

bear

BC

bank

bamboo

badminton

badly

back.

close

clever

cities

cinema

choose

choose

choice

chocolate

chimney

chemistry

cheap

change

change

cent

celebrate

catch

carry

carrot

careful

card

capital

cap

camera

call

cabbage

business

burn

brilding

build

brush

broken

bring

bright

bridge

break

brave

bottom

bone

body

blow

blind

bitten

bite

biology

billion

bill

bicycle

better

below

bell

dish

discuss

discover

direction

dirty

dinner

dig

difficult

difference

dead

diary

department

department

delicious

dear

deaf

date

dark

dangerous

dance

dance

cut

cry

cross

crocodile

crag

cover

cough

cotton

cost

correct

corner

copy.

cook

confratulation

conductor

complete

competition

compare

common

comortable

colourful

coloured

cold

coffee

coal

coal

club

cloudy

cloud

divided

dollar

farm

false

fan

famous

fallen

fail

excuse

excited

except

example

even

entrance

enough

enjoy

encourage

end

else

elephant

either

either

eaten

east

earth

early

early

earache

each

during

dumpling

dry

drum

drop

driver

drive

drink

dress

dream

double

dormitory

mistake

model