以下哪种饮品含糖量较高，长期大量饮用会引起肥胖？（）
A.白开水
B.可乐
C.绿茶
D.酸奶
参考答案：B
I’m not sure if they _ us with the chores tomorrow morning. [ ]
A. will help
B. help
C. are helping
D. helped
简述选择苗圃地时应考虑的条件。
