与公募基金相比，私募基金的投资风险较高，主要以具有较强风险承受能力的富裕阶层为目标客户。( )
参考答案：对
We couldn't catch up with the others because they________too long before us.[ ]
A. started
B. were starting
C. have started
D. had started
在做市商市场，证券交易的价格由做市商和投资者协商决定。( )
