After _______ absence of 10 years from his hometown, Mr. Li doesn't know _______ great changes have taken place there.
No matter ______ says no to us , we will return to our motherland.
It was _______ that they planned to have a picnic.
Smith has made _______ that we are all surprised .
We are going to have a barbecue _______ it rains .
He wouldn’t give up smoking _______ his doctor told him it was a matter of life and death.