---Is everything settled?
---Not yet. _____ I approached the problem, I couldn’t find a solution.
A. Whatever B. However C. Whenever D. Wherever
The retired professor, _____ in his new book in the past three years, hasn’t realized the decline in his health.
A. involved B. being involved C. having involved D. to be involved
With the final exams coming, Mark, the top student in our class, is not worried about Chinese, and _________ English.
A. still more B. at least C. least of all D. better than
It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
A. that; while B. what; while C. that; as D. what; as
Many Internet users make _____ most of the half-price promotion and it is _____ good opportunity for online shopkeepers to get their names known.
A. a; the B. /; the C. the; / D. the; a
I barely have time to think, ________ relax with a cup of tea.
A. better than B. rather than C. much less D. less than
