问题
选择题
Is ____ dangerous to swim in the river alone?
A.it
B.this
C.that
D.he
答案
答案:A
本句it为作形式主语,不定式短语放在后面作真正主语。
Is ____ dangerous to swim in the river alone?
A.it
B.this
C.that
D.he
答案:A
本句it为作形式主语,不定式短语放在后面作真正主语。