Playing football is ________ great fun, it also provides us with a chance to develop our sense of ________ team spirit.

Must I turn off the gas after cooking — Of course . You can never be____carefulwith that .

Do you think you will be able to finish yourwriting by five o’clock today— __________ I’ll be busy with experiments all day

The silence in the dark building was scaringNo sound and voice____ heard at that moment

Einstein, for _____ life had once been very hard, wassuccessful later in science