A. make a bet B. user-friendly C. profit D. disbelief A. requisite B. out of work C. whoever D. go ahead A. bead B. bow C. clash D. marble A. in cash B. unbelievable C. turtle D. litter basket A. on the contrary B. differently C. organizational D. representative A. trial B. silent C. say D. adventure A. earn B. argument C. seek D. lose one's way A. apology B. bring up C. lunar probe D. clerk A. broker B. fault C. spire D. alien A. make one's bed B. unpaid C. drive away D. play against