All the flights ______ because of the snowstorm, we had to take the train instead.
The back garden of our house contains a lawn, ______ very pleasant to sit on in summer.
John’s score on the test is the highest in the class; he _____ last night.
The_______ of the system of regional autonomy for ethnic minorities has underground long periods of exploration and practice.
As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.
It was John who _______ the idea of doing it this way.
The earthquake broke out on a day _______ my father left for America, a day _______I’ll never forget.
本节课的教学存在什么问题?
【简答题】
该教学片段中存在什么问题。
针对上述问题,应该如何改善。