_______ and _____ are going abroad next Thursday. Which is wrong? [ ]

Wow, Wendy, it’s cool to make a short video with your mobile phone.—Just with a software called Meipai. Let me show you .

People come into your life for a reason, a season or a lifetime. When you_______ which one it is, you will know what to do for each person.

Only thenhow much damage had been caused.[ ]

The boy will _______ crazy if you do not allow him to use the computer.[ ]