在正常市场中价差最多只能扩大到和持仓费相等的水平。( )
参考答案：对
连词成句。
1. David , day , has , today , busy , a (.)
2. ready , they , lunch , are , for (.)
3. join , want , does , to, he , us (?)
4. to , it's , homework , me , time , do, my , fo r(.)
5. goes , Sam , on , eight , foot , to , at , school (.)
