We are ( ) the flowers once a week .
B made to water
使役动词make的用法要注意,主动形式make sb do sth让某人做某事
而其被动形式to要还原,变成sb be made to do sth.因此选择b.
a.ask sb to do -sb be asked to do.少勒个to
c.watered应改成water.
d.make应该改成被动.