Europeans always hold their fork in the left hand, ________Americans switch it between their left and right hands.
The fact has worried people _______ the number of the deaths is still increasing.
Either you or he _______ to give them a lecture tomorrow.
I _______ online games for two years, but I’ve never regretted giving it up.
Many children always disagree with _______ their parents suggest.
He is always telling the director how to run the business, _________ is like teaching one's grandmother how to suck eggs.