1、Three large __________(地球仪) stand on the floor.
2、Put the milk in a ____________(浅的) dish.
3、The doctor told me to take the medicine ____________(定期地) three times a day.
4、The pollution of the river has ___________ unsafe drinking water.
河流的污染导致饮用水不安全。
5、科学家们仍然致力于研究到达太空的新办法。
The scientists are still ________ studying new methods of reaching outer space.
6、他们把过多的二氧化碳释放到大气层中,这使得地球上的热不能释放到太空中去。
They are putting too much carbon dioxide into the atmosphere, which ______ heat ______ escaping from the earth into space.
