_____ scores of times , but he still couldn’t understand it ．
A．Having explained B．Having been explained
C．Though it was explained D．It was explained
______ delighted me most was ______ my daughter was admitted to Beijing University．
A．That, what B．What, that C．What, what D．That, that
----- Would you please give us a talk on English learning?
----- _________
A．Ok．When? B．Why? Yes．
C．Ok．How? D．Sure．What?
----- How on earth did these problems _______?
----- Because they ignored the advice of the expert．
A．come across B．come down
C．come on D．come about
The car ran down the hill, and the driver _______, according to the local newspaper, to have been killed in the accident．
A．reported B．had reported
C．was reported D．was reporting
It was not until she had arrived home her appointment with the doctor．
A．did she remember B．that she remembered
C．when she remembered D．had she remembered
