试题详情

Mr. Smith gradually _____ a knowledge of the subject.

Mr. Smith was much surprised to find the watch he had had _____ was nowhere to be seen.

---May I speak to Mr. Smith? ---_____ is Mr. Smith speaking.

gh the report was interesting and informative, much of the material was not _____ to the subject as

The part of the grammar that represents a speaker’s knowledge of the structure of phrases and sente