1) Cot(4x+pi/4)+3=0

2) tan(1+2x)=2/3

1. I remember (read) this story several times.

2. He tries (work to save money.

3. We don’t have much time. Don’t stop (work)____________, please.

4. I was really busy last week, so I forget (phone)____________ you.

 <sub><sup>After she (fill) _________________ the basket, she (go) ____________________ to the check out.
1. Two days ago I (meet) ______________ an old friend who I (not, see) ______________ for years.
2. Before he won the lottery, he (not, enter) ______________________ any kind of contest.
3. I (work)_________ here for 10 years before you (came)________ last week.
4. When we (get)__________ to the theatre, the film (end)_______________.
5. When I (be)______________ young, I (eat) ____________ so much candy.
6. When they (get) ………………… to the station, the train (leave) …………………</sup></sub>

^{Choose the word whose main stress is on different position from others}

^{1.      A. celebrate                 B. together                        C. family                     D. special}

^{2.      A. invitation                B. question                        C. accident                  D. helicopter}

^{3.      A. informal                  B. classmate                      C. library                     D. horrible}

^{4.      A. refreshment            B. memorable                    C. unselfishness          D. appreciate}

^{5.      A. constancy               B. confidence                    C. celebrate                 D. acquaintance}

^{6.      A. anniversary             B. enthusiasm                    C. apartment               D. embarrassing}

^{7.      A. extremely               B. excited                          C. personal                  D. imagine}

^{8.      A. embarrass               B. experience                    C. extremely                D. excellent}

^{9.      A. imagine                   B. memory                        C. difficult                  D. teenager}

^{10.  A. serious                    B. attitude                         C. appreciate               D. interesting}

^{11.   A. holiday                  B. apartment                     C. remember                D. expensive}

Choose the underlined part pronounced differently from others

1.      A. machine                  B. change                                      C. watching                 D. choose

2.      A. challenge                B. chip                               C. chemist                   D. children

3.      A. danger                    B. village                           C. general                    D. together

4.      A. happy                     B. husband                        C. helicopter                D. honesty

5.      A. celebrate                 B. helicopter                      C. memorable              D. refreshment

6.      A. anniversary             B. attitude                         C. affect                      D. clap

7.      A. guitarist                  B. passenger                      C. generous                 D. village        

8.      A. hand                       B. hour                              C. housewife               D. homework

Rewrite, using “if”:

1.    Unless we use more and more public vehicles, we will run out of oil soon.

à _________________________________________________________________

2.    Unless  we run out.of oil, we won’t need other kind of energy.

à _________________________________________________________________

3.    Pollution will not  increase unless  we use more oil and coal.

à ________________________________________________________________

4.    Unless pollution increase, more and more trees will die.

à _____________________________________________________________

5.    The climate will not change unless more and more trees die.

à __________________________________________________________________

6.    Unless  the climate change, wewon’t meet with natural disasters.

à _____________________________________________________________

7.    Unless we  try to control pollution, it won’t be very expensive.

________________________________________________________________

8.    I will not tell him this news unless I see him.

à _________________________________________________________

9.    Unless  you hurry, you will be late for school.

à ________________________________________________________

10. We will not be tired unless we walk to the market.

à _________________________________________________________-