问题

Some of my friends are interested in science, but none of them can tell ________.

A:when UFOs appeared next time
B:that horses know the way or not
C:where was this kind of plant found
D:how elephants communicate;

正确答案是：

同类题型

Having fun______ friends doesn’t mean playing tricks____ them.[ ]

I was surfing the Internet _____of successful rendezvous and docking of Shenzhou-VIII and Tiangong-I.

________ the case, I couldn’t help but _________him

34．________spending our vacation in the city，why not try hiking in thecourtry

e scared to death when the fire _____Fortunately, it was put out before it caused much damage