35. A. in B. at C. with D. from
34. A. safer B. more safer C. dangerous D. more dangerous
33. A. difficult B. different C. worried D. excited
32. A. used B. made C. spent D. borrowed
31. A. keeping B. kept C. keeps D. keep
30. A. what B. why C. when D. where
29. A. we B. she C. he D. they
28. A. if B. or C. though D. till
27. A. cross B. crossing C. across D. to cross