Young people are under great pressure. Therefore, parents shouldn’t expect too much from them, forit will only cause pressure to ________.[ ]

We were listening closely to the lecture yesterday evening when suddenly the light ________

The sun ___ we get heat and light is the most important source of energy.

Long time no see. Haven’t you graduated from college—Yes. I ______ Social Science for 4 years in Shanghai.

23Speed of cars is measured ________kilometres per hour