I wonder if she______us,but I think if she______us we will be able to complete the task ahead of time.
A．helps;helpsB．will help;has helped
C．helps;will helpD．will help;helps
B
I wonder if中的if表示“是否”，從句中應(yīng)該用一般將來時(shí)；I think if ...中的if引導(dǎo)條件狀語從句，意為“如果”，從句中用一般時(shí)代替將來時(shí)。
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