1.I'll tell you__C__.
A.a good news B.good a news
C.a piece of good news D.some piece of good news.
首先,news是不可数名词,不能直接跟“a”搭配,排除A,B
其次,piece 是可数的,some piece要改为：some pieces才对,排除D
所以选C
2.They found the __D__ dog three days later.
A.lose B left C.missed D.lost
首先判断本句dog前缺少形容词,所以排除A,B
其次,miss 的形容词形式是“missing”,而不是“missed”
总之,lost = missing丢失的,失踪的
3.Jim is always the first to _D__ school.
A.reach to B get C.arrive D.arrive at
英语中表示到达有三种表达法：
get to
arrive at/in
reach
其中,reach是及物动词,后面直接接宾语,不能加介词,排除A
get 要跟 to 搭配
arrive at +小地点
arrive in + 大地点