英语翻译
1.He does not know —— he should bring a present.
A.what B.how C.if
2.请先给我们做个自我介绍吧!
Please —— ___ to us first.
3.我害怕晚上出去.
I am afraid of —— ------ at night.
4.What if ———— brings present to her party?
A.everyone other
B.other everyone
C.everyone else（第4题解释一下）