It rained a lot during their journey,so they _______ have had a good time.

You ________ pay too much attention to your reading skill, as it is so important.

 I wrote a letter to John for his help during my high school years，without which I ________  the college entrance exam.

—Where have you been?—I         in the heavy traffic. Otherwise I         here earlier.

________ the help from the doctor, the little boy _________ his life.