动词的恰当形式填空
【小题1】The traditional approach to __________(handle) complicated problems is to break them down into simple ones.
【小题2】Scientists say there’ll be many more discoveries __________(make) about the tomb of Qing Shihuang.
【小题3】The manager was removed from his post, leaving many problems remaining difficult __________(solve).
【小题4】What’s the present situation __________(concern) the use of chemical weapons in Syria?