Out of the crowded bus _______, who was dressed in a black suit and waved to a woman.
| A．a tall man in his thirties stepped | B．stepped a tall man in his thirties |
| C．did a tall man in his thirties step | D．did a tall man step in his thirties |
Children like to _____ what they have but others don’t have, which makes them proud.
| A．cheer up | B．give up |
| C．show off | D．put off |
_____ a reply, I decided to write another letter.
| A．Not receiving | B．Not received |
| C．Not having received | D．Having not received |
We were having a picnic when _______ there came a downpour, which was really a wet blanket.
| A．all at once | B．in addition |
| C．in return | D．as well |
______ the books, he realized they were far from enough and told some of us to share.
| A．Having counted | B．Counts |
| C．To have counted | D．Counted |
Gary was behaving as if nothing _______.
| A．happened | B．has happened |
| C．had happened | D．will happen |