单项选择题

If Helen______the doctor's advice, she would not be sick now.
A．should follow
B．had followed
C．has followed
D．follows

A.
A．should
B.had
C.has
D.follows
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单项选择题
If the weather______more favorable in the past few months, the crops would be growing still better.A．had beenB．has beenC．wereD．were to be
A.
A．had
B.has
C.were
D．were
单项选择题
If we______a little earlier, we______walking in the rain now.A．left, would beB．had left, would beC．left, wouldn't beD．had left, wouldn't be
A.
A．left,
B.had
C.left,
D.had
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