Once new difficulties ________in your work, it’s always important to use your brains.
So difficult __________ it to work out the problem that I decided to ask Tom for advice.
__________ homework did we have to do that we had no time to take a rest.
—Did Linda see the traffic accident? —No, no sooner __________ than it happened.
Fred is second to none in maths in our class, but believe it or not, he _______ passed the last exam.
It was raining heavily. Little Mary felt cold, so she stood ____ to her mother.