中国大学MOOC: The children have been watching TV since six oclock.
举一反三
- They ______ TV for two hours. A: had watched B: are watching C: watched D: have been watching
- 中国大学MOOC: I have been studying English since I ____ a child.
- 中国大学MOOC:"Since I have been ill, my appetite has diminished.";
- 中国大学MOOC: Watching TV may help us _________________.
- What may happen to children after watching nature programs on TV？