With the development of production and science,radio a wide use in a short time.
You can use a large plastic bottle, _____ cut off, as a pot to grow young plants in.
Although at present human egg cells and embryos needed for cloning research are difficult _____, Newspapers _________ evil leaders hoping to clone themselves.
Quzhou is ______ most comfortable city, where you can visit a great many interesting places, such as______ mysterious Longyou Grottoes.
I have already forgotten ______ you bought the computer.
With five professional hands ______ them next month, these students are sure to complete the experiment on time.