1. B. will be able to do ( in the future )

2. A. might help ( in the near future )

3. B. Will - be able ( in 2050 )

4. C. reduce - will be( câu điều kiện loại 1 )

5. B. couldn't surf ( many years ago )

IV- Choose the best option to complete each sentence.
1. Some robots _____________ dangerous work for us in the future.
A. do                                      B. will be able to do                                 C. could do
2. In the near future, a super smart TV ___________ me surf the Internet, send and receive my e-mails and contact with my friends from all over the world.
A. might help                         B. helped                                                  C. helps
3. _________ soldier robots ____________ automatically or under human control in 2050?
A. Could – fight                    B. Will – be able to fight                         C. Do – fight
4. If we _________ the use of plastic bags, our world ____________ greener.
A. reduce – is                        B. reduce – could

be                        C. reduce – will be
5. Many years ago, people __________ the Internet by phones.
A. might not surf                  B. couldn't surf                                       C. won't suft