题目

 –Jimmy had a lot of parties recently. —Yes, that might      why he didn’t do well in the test. A．sum up    B．add up to   C．account for   D．make sense of 答案：C一个西瓜里，有许多种子，这说明西瓜花里有许多（　　）A．子房壁B．子房C．胚珠D．珠被