Tom lately has been working on his new book.
举一反三
- All these days he ______on his paper. A: has worked B: has been working C: was working D: is working
- 2. How long has Brad been working with his company?
- His uncle is a worker and has been working in the factory for more than ten years._______
- Jack _______on the project day and night for two months now, and I am<br/>beginning to worry about his health. A: has been working B: would be working C: had been working D: was working
- This book is a collection of practical transistor circuits, ____ has been tested by the author in his own laboratory.