Young people must be ready take new challenges

In remote mountainous villages in China, it is not ______ to find families with men wearing thickmoustache, shabby clothes and worn shoes, chewing tobaccos and with porridge as their main daily food.[ ]

下列各句中，没有语病的一项是

.President Hu said that Africa-Chinarelations had progressed________with fruitful co-operationIn many new fields．

This is usefulmachine which was made in ________thirteenth century