Would it be ___ for you to pick me up at four o’clock and take me to the airport?
| A．free | B．empty | C．handy | D．convenient |
As the twentieth century came to a close，the raw materials for a great national literature were at hand，waiting ______.
| A．to use | B．to be used |
| C．to have used | D．to be using |
—What were you doing when I rang you this morning?
—I was occupied ______ the housework and kept my son occupied______ his homework.
| A．at；doing | B．with；doing | C．at；to do | D．with；to do |
By serving others，a person focuses on someone other than himself or herself，______ can be very eyeopening and rewarding.
| A．who | B．which | C．what | D．that |
Mr.Morse，who graduated from a famous medical university，spent years ______ his skills as a doctor.
| A．adapting |
| B．acquiring |
| C．occupying |
| D．concentrating |
He’s _______as a “bellyacher” —he’s always complaining about something.
| A．who is known | B．whom is known |
| C．what is known | D．which is known |