Work hard, _________ you will get good grades.
句意：工作努力，这样你就会得到好的成绩。
考查连词。or否则；but但是；and和。逗号前后的句子是顺承关系，用连词and。故选C。
Work hard, _________ you will get good grades.
—Excuse me. Where is the nearest hotel?
—Just go down this road ________ you see a library. It’s across from it.
President Xi encourages all Chinese people to plant trees______ our country can be greener and more beautiful.
It was great in the end ______ we had a terrible time at the beginning.
—Peter, would you like to go shopping with me?
—I'd love to, ________ I have to finish my homework first.
In Chinese families, people won't start dinner ________ the elders take their seats.
Swimming is, of course, interesting. But ______ we plan to go swimming, being safe must come first.
The clever boy called 120 _______ his mother fell down in the kitchen.
—I'm afraid we can't work out the math problem________the teacher helps us.
—That's true. It's too difficult.
I don’t like Sun Cinema ________ it has bad service.
