arnt both business and history, but she knows________of them well, thoughshe can speak on subjects in general

In September,2016,leaders of G20 (20国集团)members ________ in Hangzhou , China .

_________do you go to the moviesOnce a month.

This singer sang many songs, ________ some of Liu Huan’s.

_________ has Liu Xiang taken part inworld’s competitions of 110-metre hurdles— I’ve no idea. Let’s find it out on theInternet.