（ ）Jack is e-mailing his friend _____the Net now.
a.on b.in c.for d.to (选择,选一)
During ____break of _____English class,the students started a warm discussing.
a./;a b.the;/ c.a;an d.the;an
Did you enjoy ____________,boys or girls?(you) (适当形式)
What did you think of the group singing?(句意不变)
______did you _______the group singing?
They had a good time during their stay in Beijing.(句意不变)
They_____ ______during their stay in Beijing.