The PLA soldiers came to the ruins of Yushu and after ______ seemed to be a long time, they helped some victims out.
______ the first to use nuclear weapons.
So little ______ about stock exchange that the lecture was completely beyond me.
Standing on the bank, the children watched the ship ______ with all kinds of goods.
Both Lily and Lucy ______ to the party yesterday.
There are many kinds of metals, ______.