This box is so heavy that he cannot lift it______, he is only a ten-year-old child.[ ]

The old lady who caught a bad cold complained that the doctor was ______ too much for the treatment given to her．

How time flies! Three years _________ since I _________ you last time.

I find _____ not easy to answer this question in English.

I dislike shopping online, I prefer to actually see and touch what I’m buying before I pay for it, especially for clothes and shoes.—That’s right.___________.