Nuclear energy may be dangerous if
| A．controls | B．not controlling | C．not controlled | D．controlled |
________ London many times, but he knows little about the city.
| A．Having been to | B．Though he has been to |
| C．He has been to | D．He has gone to |
. He is not ________ a fool ________.
| A．such, as he is looked | B．such, as he looks |
| C．as, as he is looked | D．so, as he looks |
Neither my father nor my brothers ______ the symbol.
| A．are knowing | B．is knowing | C．knows | D．know |
This book can be used in ________ countries.
| A．English-speaking | B．English-spoken |
| C．speaking English | D．spoken English |
. After school, the students came home, ________.
| A．be happy and gay | B．being happy and gay |
| C．to be happy and gay | D．happy and gay |