41. If it ______ for the fence, he ______ into the river.A. were not; fallen B. had not been; could have fallen C were not; could fall D. had not been; could fall
It was not until midnight _______ they reached the camp site.
Your didn’t pass the driving test . _____, you failed.
Only in this way, _______succeed in solving the problem.
On Christmas Day, children had _____ singing, dancing and playing games.
______ when he was young, he would have a good job now.