The beautiful song ________ me of those happy old days we had spent together.
Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.
—Is the experiment easy? — ________ . I’ll just do my bit.
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
.---Will someone go and get Mr. Black?---He’s already been ___.
__ with such great difficulty, Jack felt at a loss ___.