1 . When the girl opened the window the next morning， she was excited to find the whole ground           with snow．

A．to cover	B．covering
C．covered	D．to be covered

2 . ____to the students at home, the textbooks enabled them to study more efficiently.

A．Distributing	B．Having distributed
C．Being distributed	D．Distributed

3 . The living room is clean and tidy, with a dining table already __________ for a meal to be cooked.

A．laid	B．laying
C．to lay	D．being laid