We/ before/ seen/ have/ Physical/ never/ this/ experiment.

A. Viet said that he would be doing a experiment at 10 o’clock following day.

B. Viet said he would be doing an experiment at 10 o’clock following day.

C. Viet said he would be doing a experiment at 10 o’clock the following day.

D. Viet said that he would be doing an experiment at 10 o’clock the following day.

A. Science plays an important role on our daily life.

B. Science plays an important role in our daily life.

C. Science plays the important role on our daily life.

D. Science plays the important role in our daily life.

A. Our life would be more convenient if there were no technical advancements.

B. Our life would be less convenient if there were no technical advancements.

C. Our life would be more expensive if there were no technical advancements.

D. Our life would be less expensive if there were no technical advancements.

A. I can’t imagine our life without science but technology.

B. I can’t imagine our life without science and technology.

C. I can’t imagine our life without science so technology.

D. I can’t imagine our life without science nor technology.

A. Lucia said that they aren’t going to the cinema that night.

B. Lucia said that they wasn’t going to the cinema that night.

C. Lucia said that they weren’t going to the cinema that night.

D. Lucia said that they hadn’t been going to the cinema that night.

A. Parents don’t allow children play computer games for a long period of time.

B. Parents don’t allow children playing computer games for a long period of time.

C. Parents don’t allow children to play computer games for a long period of time.

D. Parents don’t allow children played computer games for a long period of time.