I’m sorry I didn’t phone you,but I’ve been very busy ________ the past couple of weeks.
I am sorry I didn’t hear you clearly. _____you repeat it please?
—I regret____ to tell ____you that John has been fired.—I can hardly believe my ears. He is such a fine worker.
He failed the mid-term examination and only then________how much time he had wasted.
There are 30 people________in the traffic accident but the injured ________ rescued at once.
________is no possibility________she can finish the task in two hours.