The toughest thing about success is ________ you have to keep on being a success

The scientist was rewarded by the government for _____ such a great contribution to the country.[ ]

It was a great day, ______ we did not enjoy it at thebeginning.

My mother has not yet recovered from the illness, but she is __________ getting better

_____ his timely help, Kate overcame the hardship at last[ ]