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
The strategies that he came up with fine.
A. work out B. worked out C. working out D. to work out
These books should provide us all the information we need.
A. in B. for C. with D. to
