问题
选择题
What the boy ____ make his friends happy.
A．does did
B．did did
C．do do
D．do does
答案
答案：B
第一个did做主语从句的谓语, 第二个did是主句谓语的强调形式。
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What the boy ____ make his friends happy.
A．does did
B．did did
C．do do
D．do does
答案：B
第一个did做主语从句的谓语, 第二个did是主句谓语的强调形式。