—I think trees ____________ twice a week
题型:选择题
问题:
—I think trees ____________ twice a week in such hot weather.
—Yes, I agree. Or they may die without water.
A.must water.
B.are watered.
C.must be planted.
D.must be watered.
—I think trees ____________ twice a week in such hot weather.
—Yes, I agree. Or they may die without water.
A.must water.
B.are watered.
C.must be planted.
D.must be watered.