— Has your father returned from Africa yet? — Yes, but he here for only three days before his company sent him to Australia.
---Whose advice do you think I should take? ----______.
Is it the pigeon to______ he attached the message ______ carried the news there?
You are ______ to be hit by lightning ______be attacked by a shark, so don’t be frightened by sharks.
You will have an accident if you don’t ______, for the road is icy.
Many rules in English are ______, and large numbers of students feel ______ them.