I just don’t understand _______ that leads to so many teenagers becoming addicted to playing computer games．
A．why it does B．what it does C．what it is D．why it is
Amy joined a painting group but didn’t seem to _______, so she left．
A．show off B．go up C．fit in D．come over
--- Did you enjoy yourself last night?
--- Yes, it’s very nice of you．I appreciated ________ to the party．
A．to be invited B．to have invited
C．having been invited D．having invited
Nowadays, teachers tend to be more dependent on _______ is thought to be a great teaching aid---the computer．
A．that B．which C．what D．as
Whenever I met her, _________ was fairly often, she greeted me with a sweet smile．
A．who B．which C．when D．that
---Can I keep the book any longer?
---Yes, but it _______ be renewed when time is due．
A．shall B．need C．will D．can
