We are all for your advice that Johnat home until he makes a full recovery

His idea was considered ______. which of the following ones is wrong ?

I am very grateful for your assistance, and hope that one day 1 may be able to do something for you__________.

Could I surf the Internet for twenty more minutes, Mum?—Oh, dear, if you________.

Find ways to praise your children often，________you’ll find they will open their hearts to you.[ ]