31．—So you know Della?
—Yes, it was last week__________I surfed the Internet.

28. John may come to see me tonight. I can’t go to the movie with you______he visits.

A．as long as

B．in order that

C．because

D．in case

24. —— How about camping, just for a change?
—— OK, ______ you want.

I thought we’d be late for the concert, ______ we ended up getting there ahead of time.

Animals suffered at the hands of Man ___ they were destroyed by people to make way for agricultural had to provide food for more people.

All people,     they are old or young, rich or poor, have been trying their best to help those in need since the disaster.

The artist was born poor,     poor he remained all his life.

People in Chongqing are proud of       they have achieved in the past ten years.

We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.

I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back.