Tom _______ go to Jenney’s birthday party because he argued (争吵) with her days ago.

Figures show that 6 to 10 percent of Internet users become _______ and waste a lot of time.

The price of this bicycle is quite _________.I don’t have enough money to buy it.

nt research shows that there _____ volcanic activities on the moon and Mars. However, they no longer exist now.

eks left lying on the road with no one offeringhelp, _____ a heated discussion on the Internet .