Giúp mik xem câu nào sai k ạ , nếu sai thì sửa giúp mik nha

a,b,c≥0

 a²+b²+c²=6

cmr: 5ac−15≤2(ab+bc+abc)≤7+5ac

EXERCISE 11:

a. I (1. not use) ___________ the car this evening, so you can have it.

b. I walked along the street when suddenly I heard footsteps (2. follow) _________ behind me.

c. The house where the dead man (3. find) ______ is being guarded by the police to prevent it from (4. enter) ______.

d. This is only one of his poems that is worth (5. read)______.

e. I wish John (6. be) ___________________ by my side.

f. By eight o'clock this evening, the spaceship (7. travel) _______________ for five hours round the earth.

g. Minh (8. know)_______________ the answer because she smiled very happily. h. It (9. be)__________________ my birthday tomorrow.

i. He behaved as though he (10. be) ________________ a prince.

EXERCISE 10:

91. You already (give) the job when you got married?

92. Were I (have) a ship, I would travel around the oceans on earth.

93. It is the first time I (take) an exam like this.

94. The film already (show) by the time we got to the cinema last night.

95 Does that road really need (resurface)?

96. I’d rather you (keep) your mouth shut.

97. The laundry has a nice fresh smell from (dry) in the sun.

98.. I wouldn’t waste time (read) that book if I were you.

99. The teacher had no difficult getting the students (understand).

100. Had you taken the doctor’s advice, your illness (not/ become) so serious.