5.All their attempts to ________ the child from the burning building were in vain.
The retired worker likes getting up early. The air in the morning is good ______.
They must have finished the work by the end of last month, ______?
— He thinks that girls are smarter than boys when it comes to learning English. — But two years ago he thought_______.
I enjoyed the part of the film ______ the boy was playing with model soldiers and suddenly they all came alive and started running across the table.
Better go to see your sick colleague right now, ______ you?