I have many friends, _____ some are businessman.
| A．of them | B．from which | C．who of | D．of whom |
—Were you worried about your daughter last night?
—Yes. It was __________.
| A．until she returned that I went to bed |
| B．until she returned when I slept well |
| C．not until she returned that I went to bed |
| D．not until she returned when I slept well |
Mr. Li is __________ chairman of the meeting.
| A．a |
| B．the |
| C．/ |
| D．an |
This school was the first __________ textbooks as well as reading materials.
| A．publishing |
| B．to publish |
| C．having published |
| D．published |
You can never be __________ when crossing the street.
| A．very careful |
| B．too careful |
| C．carefully enough |
| D．enough careful |
—He was nearly drowned once.
—When was __________？
—__________ was in 1998 when he was in middle school.
| A．that ； It |
| B．this ；This |
| C．this； It |
| D．that；This |