5. People have already left the flooded villages when rescue workers arrived.

         A                B                                     C                                             D

6. We will be communicate just by thought over the network in the year 2030.

            A                  B                             C                                    D

7. Do you want learning shorthand in 15 minutes?

     A                      B                        C           D           

1. The last time Phong visited his grandparents was a month ago.

Phong has 

2. His mother often buys him new clothes before Tet.

He 

3. Global warming has caused many natural disasters.

Many natural disasters 

Plastic bags take so long to decompose. Nearly all of them still exist in the environment today. (because)