Mary failed the driving test again. If she ______ harder, she ______ the test easily.
—Why did he come back? —It is ______ he forgot to take his umbrella with him.
— Bob didn’t pass this exam.— He____________.
Jim, I’m _______ my present job. I want to look for another one.
He ______ his conclusions on the facts that are known to everyone.
—How many times have you been to China?—In fact, it is the first time I __________ here.