làm hộ câu B

EX 2. Put the verbs in brackets into the correct form of conditional sentence type 2.

 1.  If I (be)                  the president, I (pass)                          harder regulations for using fertilizers in agriculture.

2.   If I (be)                  you, I (not eat)                        that genetically modified potatoes.

3.   If big corporations (care)               more about the environment and less about their own pockets, the pollution from factories (not increase)                               so fast.

4.   He             (sort)                             his trash, if he (be)                  smart.

5.   If the seas (pollute)                       , maybe the population of whales (recover)                            .

6.   If I (not throw)                              this can of Coke into the bushes, I (not know)                                   that Coke is poison for wild animals.

7.   If the factories (not dump)                        untreated waste into the ocean, fish (die)                  massively.

8.   What (do)                           you if you (be)            President.

9.   If the air (not be)                            dirty, the breathing problems (reduce)                       .

10. If I (own)               a lonely island, I (build)                      a huge house by the beach.

EX 1. Put the verbs in brackets into the correct form of conditional sentence type 1.

1.   If people (pollute)                         the environment, a lot of animals (die)                      .

2.   If water (consist)                            germs, people (get)                  ill.

3.   If the poles (melt)                                     , huge landmasses (be)                         under water.

4.   Many precious animals (disappear)                       , if people (cut down)                                      trees.

5.   If nuclear waste (throw)                            away, it (be)                            very dangerous.

6.   If the emission of CO₂ (continue)                          at high rate, the climate (destroy)                              .

7.   We (save)                            the trees If we (save)                         paper.

8.   If schools (teach)                           about environmental problems, All students (know)                          how to protect the environment.

9.   If more people (travel)                               by bike or bus, we (not have)                          traffic jam.

10.       If the government (fine)                      heavily to the factories, they (not dump)                                 

x²-3x-1=0

so sánh M,N 

M=\(\dfrac{2003}{2004}+\dfrac{2004}{2005}\)

N=\(\dfrac{2003+2004}{2004+2005}\)

so sánh các phân số sau ( n là số tự nhieen)

\(\dfrac{n}{n+3}:\dfrac{n-1}{n+4}\)

có bốn bạn An,Bình ,Dũng,Minh cùng chơi bi.biết An có 18 viên bi, bình có 16 viên bi, dũng có số bi bằng TBC số bi của An và Bình .Minh có số bi bằng TBC số bi của cả bốn bạn.Hỏi Minh có bao nhiêu viên bi