If you want to be popular, , join in our class activities and make a contribution to our class if possible.
Helen was much kinder to her youngest child than she was to the others, _____, of course, made the others unhappy.
The reason why he was late was _______ he had take a wrong bus.
The school ______ I visited last year was not the one _______ I once worked.
Not that John doesn’t want to help you, ______ it’s beyond his power.
_______ is known to us all is that China is a developing country ______ the Third World.