22.(单选题, 2分)Too much time () on computer games by most teenagers every day. And their parents are worried about their health andstudy.

4.(单选题,2分)Mary had an () ;she's been knocked down by a taxi.

3.(单选题,2分)Jane had promised to give me a timetable for tomorrow. She failed, ().

2.(单选题,2分)They were angry because you () your promise.

1.(单选题,2分)He had so little education()he was unfit for this job.