The research on the new flu virus vaccine ischallenging and demanding. Who do you think can do the job—____ my students have a try

Thoughof taking too many risks, the climber continued his challenge.

___________ great fun it is to fly kites!________ fantastic time the children are having!

Look, theroller coaster !

填入下面一段文字横线处的语句，最恰当的一句是（ ）战争题材影视作品，因为先天具有波澜壮阔的历史背景、纷繁复杂的人物事件、恢弘磅礴的战斗场面等，长期为影视界所钟情。 ，再现那些激荡人心的历史瞬间，具有广泛的观众基础，在当代荧屏上占据很大比重。