Mr. Oven has three children, one of whom is a child of six, ___ twins of twelve.
. ______ your timely warning, we would have been unaware of the danger.
. The question then ______ that the supply of drinking water in the mountainous area is serious.
.We could hardly believe what she says because she is ______ changing his mind.
. . —OK, $ 500, but that is my last offer.—_______.
. To deal with the global financial crisis, China ______ the international community to help developing countries.