Now Tom with his classmates ________ football on the playground.
A. play B. are playing C. plays D. is playing
With two children ______ middle school in the nearby town now, the parents are working hard.
A．to attend B．attending C．attended D．having attended
Having answered the phone, I couldn't but ______ what would happen next.
A．wondering B．wondered C．wonder D．to wonder
All of us remember the earthquake that ______ Wenchuan in 2008.
A．attacked B．struck C．knocked D．exploded
Paul had to write a history paper, _____ he couldn’t find time to do it.
A. but B. so C. because D. if
They want to know ______do to help us.
A. what can they B. what they can C. how they can D. how can they
