Question

—Hi，Tracy，you look tired.

—I________the living room for three hours.

A．paint                                             B．had painted

C．was painting                                    D．have been painting

Answer 1

D　考查動詞的時態(tài)�，F(xiàn)在完成進行時態(tài)表示從過去開始的動作一直持續(xù)到現(xiàn)在，還有可能繼續(xù)持續(xù)下去。根據(jù)語境這里是說Tracy從過去開始給客廳刷油漆，到現(xiàn)在為止一直刷了三個小時，有可能還要刷下去，故選D項。