9. My sister and I are very friendly.
10.Three students are at school now

cái un ấy

I’ve been unemployed for six months. I have to find work at once. (employ)

I’ve been emplyment for six months. I have to find work at once. (employ)

87. He told me he (not/eat) doesn't eat such kind of food before.
88.In all the world, there (be) are only 14 mountains that (reach) reach above 8,000 meters.
89.He sometimes (come) comes to see his parents.
90. When I (come) came, she (leave) had left for Dalat ten minutes ago.
91.4.My grandfather never (fly) has never flown in an airplane, and he has no intention of ever doing so.
92. .We just (decide) have just decided that we (undertake) would undertake the job.
93. We just (decide) have just decided that we (undertake) would undertake the job.
94.He told me that he (take) would take a trip to California the following week.
95.I knew that this road (be) was too narrow.
96.Right now I (attend) am attending class. Yesterday at this time I (attend) was attending class.
97.Tomorrow I’m going to leave for home. When I (arrive) arrive at the airport, Mary (wait) will be waiting for me.
98.Margaret was born in 1950. By last year, she (live) had lived on this earth for 55 years.
99.The traffic was very heavy. By the time I (get) got to Mary’s party, everyone already (arrive) had already arrived
100.I will graduate in June. I (see) will see you in July. By the time I (see) see you, I (graduate) will have graduated.
101. I (visit) visited my uncle’s home regularly when I (be) was a child.
102..That book (be) has been on the table for weeks. Haven't you (not read) read it yet?
103. He just (repair) has just repaired the TV set.
104. We have never met him. We don’t know what he looks like.
105. I think he .......will come... here tomorrrow
106. On arriving at home I found that she had just left a few minutes before
107. When we (arrive) arrive in London tonight, it probably (rain) be raining
108. It (rain) is raining hard. We can’t do anything until it (stop) stop
109. Last night we (watch) were watching TV when the power (fail) failed
110. That evening we (stay) stayed up to talk about the town where he (live)has lived for some years.
111. I (sit) sit down for a rest while the shoes (repair) is being repaired_____.
112. Half way to the office Paul (turn) turned round and (go) went back home because he (forget) forgot to turn the gas off.
113. London (change) has changed a lot since we first (come) came to live here.
114. While we (talk) were talking on the phone the children (start) started fighting and (break) breaking a window
115. He used to talk to us for hours about all the interesting things he (do) has done in his life.
116. You know she (stand) has stood looking at that picture for the last twenty minutes.
117. I (spend) have spent a lot of time travelling since I (get) got this new job.
118. When we (be) are at school we all (study) study Latin.
119. When I (meet) met him, he (work) has work as a waiter for a year.
200. After he (finish) had finished breakfast he (sit) sat down to write some letters.
201. She (have) has a hard life, but she's always smiling.
202. I think Jim (be) is out of town.
203. She (just/come) has just come back from a Mediterranean cruise.

gọi số bé là : a

gọi số lớn là : b

Ta có: a + b = 200 và a = 3 5 b

Số bé là: 200 : ( 3 + 5 ) .3 = 75

Số lớn là: 200 − 75 = 125

\(\dfrac{\sqrt{\left(1+\sqrt{5}\right)^2}}{2}nha\)