Dr.Frank failed many times but he finally _______ to find a successful way to solve the problem.
Millionaires are often very generous and __a lot of their money to charities to help the poor.
The student did not catch the last bus, _______, it began to rain cats and dogs.
______ you have tried it, you can’t imagine how pleasant it is. A. When. B. Because. C Although. D. Unless.
The audience were ______ by his _______ performance on the stage.
John may phone tonight. I don’t want to go out ________ he phones.