Some of my friends are interested in science,but none of them can tell A when UFOs will appear next time B why do horses know the wayC where was this kind of plant found D how do elephants communicate
—How can I get a present in the game show? —You _________ one if you answer all the questions correctly.
—When _______ this stone bridge______ ?—In 1935.
Spanish ________ as the official language in Cuba.
So far, most of the work _______ by others, it’s your turn to do the rest of it.
The students how to do the experiment in class yesterday.