--- ________ Tom and his mother often watch tennis matches on TV?
--- Yes, they ________.
| A．Do; are | B．Are; are | C．Does; does | D．Do; do |
You stand in line while waiting for the bus.
| A．mustn’t | B．can’t | C．are supposed to | D．don’t |
By the time he arrived at the airport, the plane .
| A．has taken off | B．was taking off | C．would take off | D．had taken off |
The boy was seen on the sports ground.
| A．to play | B．play | C．played | D．to playing |
I went to the city, but my parents at home.
| A．got | B．remained | C．staying | D．remaining |
Mary called me to come to the party, but she herself didn’t .
| A．show around | B．show up | C．come out | D．put up |