来自梁昌洪的问题
-Iwassohappytoseetheheavyrainlastnightandtheairismuchimprovedtoday.-Yesbutlookwhattherain________totheflowersA．didB．wasdoingC．ha
-Iwassohappytoseetheheavyrainlastnightandtheairismuchimprovedtoday.
-Yesbutlookwhattherain________totheflowers
A．did B．wasdoing C．hasdone D．haddone
