cho tam giác ABC có ba góc nhọn nội tiếp đường tròn tâm O (AB<AC) . hai tiếp tuyến tại B và C cắt nhau tại M.AM cắt đường tròn (O) tại điểm thứ hai D . E là trung điểm đoạn AD . EC cắt đường tròn (O) tại điểm thứ hai F. C/M rằng :
a) tứ giác OEBM nội tiếp
b) tam giác MBD và tam giác MAB đồng dạng
c)góc BFC =góc MOC
d)BFC=MOC và BF//AM

Tìm hai số u và v trong mỗi trường hợp sau:

u + v = -42, u*(-v) = 400

Với M=

Tìm số tự nhiên a để 18M là số chính phương

Use relative pronouns or adverbs to combine each pair of sentences below

1/ The girl is from Australia. She sits nest to me

________________________________________

2/ I thanked my friend . He had helped me overcome these difficulties

__________________________________________________________

3/ The teacher is excellent .I am taking his course

_______________________________________

4/ I saw a lot of people and horses . They went to market

________________________________________________

5/ Tom has three sisters> All of them are married

___________________________________

6/ Do you know the music ? It is being played on the radio

_______________________________________________

7/ The day was rainy .My father left on that day

__________________________________________

8/ You sent me a present . Thank you very much for it

_______________________________________________

Fill in each blank with ONE suitable relative pronoun

1/ the boys _________ are playing in the garden are my friends

2/ Mai is the girl __________ bicycle was stolen last week

3/ Is this the book ___________ you lost yesterday?

4/ The singer ___________ you like best is Trong Tan

5/ That's the room __________ the meeting is held

6/ All ________ glitters is not always gold

Supply the correct form of the verbs in brackets

1/ Tourists could see fish(swim)_____ along the brook

2/We enjoy (watch)______the news on tv every day

3/ The form teacher hasasked his students(write)______ an essay on

4/they've finished(do)_______their homework

5/ they noticed lots of sheep(graze)_______in green meadows

6/ do you smell something (burn)_______in the kitchen?

7/ i advised him (wait)_______ for me at the airport

8/ we will have the grass (cut)_______ tomorrow

9/ does mrs.nga have them (carry)_______those books back home?

10/ we heard mr.binh (park)_______his car near the gate

Put the verbs in brackets into the correct form

1/ My brother likes (play)__________ basketball after school

2/ if the weather is hot ,my father (go)__________ for a picnic

3/ She asked me if i (like)__________ pop music

4/ When i (arrive)________, they were watching TV together

5/ Ba hates (watch) __________the advertisements on TV

6/ Nam often (go) __________to school by bike

7/ I(live)__________ here since 2010

8/ My father (play)__________football yesterday

9/ Nam enjoys(listen)__________to music every night

10/ I used (go)__________fishing when i was a child

11/ My father used to (go)__________fishing when he was young

12/ the sun (rise)___________in the East and sets in the west

13/ He (buy)__________ a new car last week