王奶奶住院时，我妈妈经常照看她。（take）
新冠肺炎疫情期间，劝告大家要尽可能少聚集。（as）
we were when we saw finless porpoises in the Yangtze River!
the night is, the daylight will come in the end.
We can what we need to learn what we are interested in.