The split between humans and living apes is thought by some scholars ____ 15 to 20 million years ago.
| A．to occur | B．occurring | C．to have occurred | D．having occurred |
Tom’s and John’s＿＿＿＿＿came to London last week．
| A．father-in-law | B．fathers-in-law | C．fathers-in-laws | D．father-in-laws |
The suggestion has been made＿＿＿the basketball match＿＿＿put off．
| A．for； to | B．that； be |
| C．which； should be | D．to； being |
Mr Wang gave us＿＿＿＿＿on how to improve our English．
| A．so good an advice | B．a good advice |
| C．some good advices | D．a piece of good advice |
Boris has brains． In fact, I doubt whether anyone in the class has＿＿＿IQ．
| A．a high | B．a higher | C．the higher | D．the highest |
Jumping out of＿＿＿＿＿airplane at ten thousand feet is quite＿＿＿＿＿exciting experience．
| A．不填； the | B．不填； an | C．an； an | D．the； the |