The report shows that we’re making some progress but ______ we need to make greater efforts.
| A．that | B．whether | C．what | D．why |
. ___________ the letter, he went out to post it.
| A．Writing | B．Being writing | C．Having written | D．Written |
. Don't you remember ___________ ?
| A．seeing the man before | B．to see the man before |
| C．saw the man before | D．to have seen the man before |
. People couldn't help ___________ the foolish emperor in the procession.
| A．laugh at | B．to laugh at | C．laughing at | D．laughing on |
. We’re looking forward ___________ the photo exhibition.
| A．to visiting | B．to visit | C．to having visited | D．visiting |
. The girl ___________ under that tree is my sister.
| A．sitting | B．sits | C．is sitting | D．sat |