下面的英语怎么作？24. ________ he had worked hard, he failed to pass

下面的英语怎么作？
24. ________ he had worked hard, he failed to pass the exam.
A. Even B. While C. Although D. However
25. The girl was _________ about everything she saw.
A. content B. curious C. please D. interested
26. The police had every reason _____ suspecting him.
A. to B. from C. with D. for
27. Never before _______ see such a terrible car accident on the road!
A．I have B. have I C. I did D. did I
28. Here’s my card. Let’s keep in _______.
A. touch B. relation C. connection D. friendship
29. I think _____necessary to learn English well.
A. its B. it C. that D. it’s
30. English is a language ______ in many countries.
A. spoken B. speaking C. be spoken D. to speak