Someone who lacks staying power and perseverance is unlikely to ______ a good researcher. [ ]

xportsanimportant role in its economic growth now, this province has been affected bythe global economic downturn.

He holds an important position in the company;_______, I don’t quite trust him

下列各句中，没有语病的一句是（ ）

Ten years have passed and I’m glad to find that the local villagers are now much______ than they were before.