1 . By the way, does your package need ________(pack )? (所给词的适当形式填空）

2 . We are keen on space exploration, for there are so many mysteries waiting_________.

A．to discover	B．to be discovered
C．to have discovered	D．to be discovering

3 . After school we went to the reading room to do some reading, only ________ (tell) that it was being decorated. (所给词的适当形式填空）

4 . Group activities are scheduled to ______ after class to help children develop team spirit.

A．organize

B．have organized

C．be organizing

D．be organized