i'd appreciate ____ if you could lend me a hand with my homework.1.so 2.it 3.that 4.you为什么选2
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i'd appreciate ____ if you could lend me a hand with my homework.
1.so 2.it 3.that 4.you
为什么选2
2 it代表you lend me a hand with my homework
IT是代主语!
固定句型,貔似如此