The new research team was led by the ________engineer.
| A．main | B．major | C．chief | D．primary |
______youknowhimwell, youwillfindhimeasy to bearound and thoughtful.
| A．However | B．Though |
| C．Once | D．Before |
I’m continually losing my pens these days. I ______ them on my desk, but they disappear somehow.
| A．leave | B．am leaving |
| C．was leaving | D．would leave |
Sparing no thought for her own safety, she dived into the river ______ the child.
| A．saving | B．being saved |
| C．to save | D．to be saved |
Visitors can see the large diamond, ______ has been kept at the Tower since the 17th century.
| A．which | B．that |
| C．what | D．who |
—Sorry, I forgot to lock the door.
—______ Mike can do it later.
| A．No way | B．Take your time |
| C．Nothing serious | D．You're welcome |