21. Not Jack, but you and I _____to blame for the accident. We were so careless.
A. am B. is C. are D. should
22. Between the two sides there are too many frictions over the past few months. This month
______, they’ve had two.
A. simply B. only C. alone D. besides
23. ---I think Wood is very stupid. He should have failed such an easy exam!
--- No. In fact he is ____than stupid.
A. more lazy B. lazier C. rather lazy D. more lazily
