Question

--- Do you know Uncle Tom is crazy about gardening?
---Sure. He ____ his flowers in the garden now.

A．may be watering

B．must be watering

C．could look after

D．ought to watch

Answer 1

B

考情态动词表示猜测的用法。在表示十分肯定的猜测时，要用must。从对话来判断，此刻Uncle Tom一定正在花园里种花呢。选项A是干扰项，要注意may在表示猜测时，仅能表示不是十分有把握的猜测。