(2013·高考福建卷)The famous musician，as well as his students，________ to perform at the opening ceremony of the 2012 Taipei Flower Expo.

The majority of doctors ______ smoking is harmful to health.

Huge quantities of information ________available on the internet, but whether the information ________ reliable needs to be further proved.

—Each boy and each girl     talking about optional courses（选修课）.—Yes! And the each     their favorite one!

 I think maths ____ very interesting.