很难的高中英语语法 写理由 thanks
1.However,after a year or so _____ _____they became more serious about their work,the Monkees strarted to play and sing their own songs like a real band.(介词+ which/whom)
2.They produced a new record in 1996,____ ____ they celebrated their former time as a real band(介词+which/whom）