It’s reported that over 70 different emoticons are used in text messages，happy：)is the most popular．

He’s got himself into a dangerous situation ____ he is likely to lose control over the plane. [ ]

The young man _____ the car hoping to arrive at the station to meet his girlfriend on time.

The student said there were a few points in the essay he _____ impossible to understand.

He was unhappy when he sold his guitar. After all, he ______ it for a long time..