1.by the time you finish cooking they(do)their homework

2.can you tell me how they(escaped)?

3.does tom own that car ? - No, I think his brother(own)it now

4.he(work) as a cashier for twenty five year. Then he(retire)and went to live in the country

5.I(search)everywhere for the pen I(lose)yesterday

6.before leaving home in the morning she(tell)her mother she(work)in the factory that afternoon

7.even though(look )for a flat for a month they (be) able to find one anywhere

1.by the year 2050 many people currently employed..........(lose)their jobs

2 susan .............(work)as a nurse for three years before her marriage

3.since they had that big argument he crosses the street whenever he..........(see)

4. this time tomorrow I...........(relax)in the swimming pool

5.at the end of this month we..........(live) here for ten year

6.the beach was so crowded the other day that we.......(have)difficulty finding an empty spot

7.robert.........(work) for the company for very long before he was promoted

8........(cry)?your eyes are red

9.he looked tired because he..........(run)for six hours

10.in 1975 archeologists..........(discover)the ruins of the Olympic Stadium in Greece

cho A=\(\dfrac{\sqrt{x+6\sqrt{x-9}}+\sqrt{x-6\sqrt{x-9}}}{\sqrt{1+\dfrac{81}{x^2}-\dfrac{18}{x}}}\) với x>18

tìm x để A có giá trị nguyên