I___to download this file twice, but it's not working.(try)

• tries

• have tried

• had tried

• tried

Listen! Our teacher ___ (speak).

• is speaking

• spoke

• speaks

• have spoken

This computer game ___ very well.(not sell)

• had not sold

• is not selling

• has not sold

• doesn't sell

Many children ___ wrist pain from playing video games.(experience)

• has experienced

• have experienced

• experiences

• experienced

All of Jack’s friends ___ fun at the concert right now.(have)

• have had

• had

• are having

• have

Social media sites ___ it hard for people to study.(make)

• are making

• made

• has made

• have made

My grandfather ___ some fruits at the supermarket. (buy)

• is buying

• bought

• has bought

• buy

I believe technology ___ many teens to become jealous of others.(cause)

• has caused

• caused

• have caused

• cause

In my opinion, social media sites ___ people's communication.(improve)

• improved

• is improving

• have improved

• has improved

I think that many people's social skill ___ worse.(get)

• have gotten

• are getting

• had gotten

• got