问题
选择题
In such dry weather the flowers will have to be watered if they ____.
A．have survived
B．would survive
C．are to survive
D．should survive
答案
答案：C
句意：在如此干燥的天气中如果这些花一定要活着的话，它们必须被浇。在此题中be to do 表示将来，一定要发生，注定会发生，所以选C。