问题
选择题
Suzy can get better results in geography if she _________her best.
A．do
B．does
C．will do
D．is going to do
答案
答案：B
if引导的条件状语从句要用一般现在时。
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Suzy can get better results in geography if she _________her best.
A．do
B．does
C．will do
D．is going to do
答案：B
if引导的条件状语从句要用一般现在时。
。乙烯酮在一定条件下与下列试剂加成，其产物不正确的是 [ ]
加成生成