He came back on ___ and left on _____.
| A．a Wednesday, the Saturday | B．the Wednesday, a Saturday |
| C．The Wednesday, the Saturday | D．a Wednesday, a Saturday |
—Look at those clouds!
—Don’t worry. ______ it rains, we’ll still have a great time.
| A．Even if | B．As though | C．In case | D．If only |
All the photographs in this book, _______ stated otherwise, date from the 1950s.
| A．unless | B．until | C．once | D．if |
Hot _______the night air was, we slept deeply because we were so tired after the long journey.
| A．although | B．as | C．while | D．however |
If you happen to get lost in the wild, you’d better stay ______ you are and wait for help.
| A．why | B．where | C．who | D．what |
（2012辽宁卷）Leave your key with your neighbor you lock yourself out one day.
| A． as long as | B． even though | C． in case | D． as if |