At the age of eight, he ___ a group of child dancers.
| A．joined in | B．attended | C．took part in | D．joined |
______ the first to use nuclear weapons.
| A．At no time China will be |
| B．Never China will be |
| C．Will China never be |
| D．At no time will China be |
So little ______ about stock exchange that the lecture was completely beyond me.
| A．did I know | B．I had known | C．I knew | D．was I known |
Standing on the bank, the children watched the ship ______ with all kinds of goods.
| A．loading | B．being loaded | C．to be loaded | D．having loaded |
Both Lily and Lucy ______ to the party yesterday.
| A．invited | B．was invited | C．had invited | D．were invited |
There are many kinds of metals, ______.
| A．each having its special properties |
| B．having its special properties |
| C．one has its special properties |
| D．each has its special properties |