A. wipe out B. in surprise C. acid D. sandstorm A. clog B. dial C. hybird rice D. perpetual A. idiom B. be known as C. overseas D. board A. cheek B. talk to C. unite D. underestimate A. pioneer B. clutter C. summer D. particular A. deliever B. instruction C. unsmiling D. cut in A. she B. shake C. proportion D. forever A. difference B. president C. dream D. get along A. home and abroad B. sociologist C. revolution D. hand on A. owner B. pick up C. brake D. distinction