单项填空
选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．The China Education Expo 2010 provides visiting students with ________ wealth of information on ________ options open to them for overseas study．
A．a ; / B．/ ; the C．a ; the D．/ ; /
22．― What would you like to do? Doing shopping or going to the cinema?
― ________．Whatever you want to do is fine with me．
A．Go right ahead B．It’s up to you
C．It’s worth a go D．It’s hard to say
23．For some parents, the Internet can seem like a jungle, ______ danger for their children．
