A.has introduced

B.is being introduced

C.is introduced

D.was introduced

8.(2018天津部分区质调一,11)Various efforts in the past decades to protect the environment.

A.had made

B.have made

C.were made

D.have been made

一、阅读理解

（洛阳一高2019-2020学年高二12月月考）

Making beers on the moon might seem like a pipe dream to many,but for a group of students from the University of California at San Diego,there is a chance to take their research beyond Earth’s surface.The Lab2Moon competition,held by TeamIndus,is offering students the chance to secure a spot on the TeamIndus rocket this year.

Taking craft beer to the next level,the students want to test whether it’s possible for yeast(酵母)to work and create beer on the moon.However,they believe the experiment is not just a creative concept for astronauts,it’s also important for the development of drugs and yeast-containing food,like bread.

“The idea started out with great excitement among a group of friends,”said Neeki Ashari,a fifth-year bioengineering students at UC San Diego.“We all appreciate the craft beer.When we heard that there was an opportunity to design an experiment that would go up on India’s moon lander,we thought we could combine our hobby with the competition by focusing on the practicality of yeast in outer space.”

The preparation work for the beer—up to the stage of adding yeast—will all be done on Earth,and rather than separating the fermentation(发酵)and carbonation stage of making beer,the team plans to combine them.

This removes the need to release CO2accumulated in the process,which may result in cleanliness and safety issues out in space.

If selected,Team Original Gravity will be the first to make beer in outer space,and the fermentation will take place in a container no bigger than a soda can.

All teams competing for the place will showcase their ideas in Bangalore,India,in March.

Sadly,you won’t be enjoying moon beer in your local craft beer bar anytime soon,as no samples will be brought back.However,this small experiment could provide important data on just how practical it is for us to