下列各句中，没有语病的一句是

If you don’t go to the concert this weekend, ________.

Why _____ most stars _____ in the daytime— Because the sun is too bright.

Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _________ Sino-US relations have made remarkable progress.

(2014·邯郸模拟)I don’t think it right to________jokes on the disabled，especially when they are in trouble