They are convinced ______ the singularity of their good taste.A．ofB．onC．overD．at

They__________ building the irrigation canal very soon．A.are finishingB.are going

They are sure they have all the facts they need to ______ the existence of a black hole.A．

The volcanoes theory cannot convince everyone because______.A．there are gaps in the volcan

The speaker tells the students that they are not likely to succeed if they______.A．are too

Although they differ in some ways, they are ______ to each other in hobbies. A. si

The author is convinced that the eyes are______.A.of extreme importance in expressing feel