Science has given clear evidence ______ smoking can lead to many diseases

Would you like to come to dinner tonight？ —I’d like to, ___ I’m too busy

In order to finish the research, the professor always _______, for every day the light in his room didn’t go out until 2 a.m.

Li An’s film The life of Pi won the best director Oscar award in 2013, ______ is beyond our expectation but we all Chinese are proud of him.

Would you like him to paint your door with yellow stars?-I’d rather he ________ it blue, and without any decorations.[ ]