I have no doubt that he will make it，but I wonder __________ he is really ready enough．

When asked to explain _____ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply. [ ]

Sometimes proper answers are not far to seek_____ food safety problem

My sister is a typist at a foreign firm.—I know this sort of job ________ skill and speed.

Bob, can you read the number 15,858—Yes, I can. It’s ________.