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M=
CD
11 tháng 4 2016
1. We (wait) for her for 30 minutes.
=>We have been waiting for her for 30 minutes
2. She (go) out since 5 a.m.
=>She has been going out since 5 a.m
3. They (not eat) anything all the morning.
=>They haven't been eating anything all the morning
4. The street is full of water because it (rain) for 3 hours.
=>The street is full of water because it has been raining for 3 hours
5. She looks very exhausted because she (work) all night.
=>She looks very exhausted because she has working all night
6. I (read) this book since last night.
=>I have been reading this book since last night
7. She (chat) with her friend all the day.
=>She has been chating with her friend all the day
8. He (talk) on the phone for hours.
=>He has been talking on the phone for hours
9. She (cycle) for 2 hours and she is very tired now.
=>She has been cycling for 2 hours and she is very tired now
GOOD LUCK!!!!!!!!!!
26 tháng 4 2016
1. I/ buy/ a / will/ super/ TV/ smart/ if/ have/ I/ money.
→ I will buy a super smart TV if I have money
2. Da Nang / a/ city/ wonderful/ is.
→ Da Nang is a wonderful city
3. Have/ ever/ you/ to/ been/ England?
→ Have you ever been to England?
PT
20 tháng 4 2016
đáp án của mk là:
1.Lan’s hair is long.->Lan has long hair.
2.Nam ride his bike to school everyday->Nam goes to school by bike everyday.
3.Are there four people in your family?->Does your family has four people?
4.Nobody in my class is happier than Nga->Nga is the happiest in our class.
5.Let us go swimming->what about going swimming?
chúc bn hok tốt
HN
20 tháng 4 2016
1.Lan’s hair is long.
\(\Rightarrow\) Lan has long hair.
2. Nam ride his bike to school everyday.
\(\Rightarrow\) Nam goes to school by bike.
3. Are there four people in your family?
\(\Rightarrow\) Does your family has four people?
4. Nobody in my class is happier than Nga.
\(\Rightarrow\) Nga is the happiest in my class.
5. Let us go swimming.
\(\Rightarrow\) What about going swimming?
18 tháng 4 2016
1.
The homework was very difficult yesterday.
2.
Hello, everybody. I am sorry. I am late.
3.
– Where were you at 10 a.m last weekend?- I was in a clothing
store.
4.
– Where was your brother born?- He was born in New York.2
5.
The weather is beautiful today. It was rainy yesterday.
6.
The students are very tired today. They were at a party last night.
7.
We were in Hanoi in 2004.
8.
Now she is eighty. There were a lot of flowers at her
birthday party when she was eighteen.
Ta có: C= \(\frac{3^{99}}{3^{100}}\)+\(\frac{3^{98}}{3^{100}}\)+...+\(\frac{1}{3^{100}}\)
=\(\frac{3^{99}+3^{98}+...+3+1}{3^{100}}\)
=\(\frac{1+3+3^2+...+3^{99}}{3^{100}}\)
=\(\frac{3^{100}-1}{3^{100}}\)
=1
ủa?
hình như đây là toán mà?