舞蹈队的队员既可以平均分成5组，又可以平均分成7组，舞蹈队至少有（ ）名同学。
35
When we first met on a train in 2000, we both felt immediately that we _____ each other for years. [ ]
A. know
B. had known
C. know
D. have known
_______ of the materials I listened to at the beginning of the exam _______ easy.
A．three fourths; is
B．third four; are
C．three fourths; are
D．three fourth; are
