He smiled politely ______ Mary apologized for her drunken friends.
| A．as | B．if | C．unless | D．though |
One of the most important problems we will have to solve is _______ of students’ learning method.
| A．that | B．this | C．what | D．which |
. The house is nice, but ______ too small for a family of five.
| A．rarely | B．fairly | C．rather | D．pretty |
______ from what he said, he must be the thief who has stolen the car.
| A．Judging | B．Judged | C．To judge | D．Judge |
. They were surprised that a child could work out the problem ______ they themselves couldn’t.
| A．once | B．while | C．then | D．if |
. --- I hear Jane has gone to the Holy Island for her holiday.
--- Oh, how nice! Do you know when she ______ ?
| A．was leaving | B．had left | C．has left | D．left |