初中英语不定式选择题

He is not old enough ________ to school．（　　）

A．

gone

B．

going

C．

went

D．

to go

The man drew a series of pictures about Wechat____how to use this software．（　　）

A．

to show

B．

showed

C．

shows

D．

to showing

The earth is in great danger now.We have to do something _______ it.（　　）

A．protectB．protectingC．to protectD．protected