题目

Look! There is ________ umbrella on the ground.A.a B.an C.the D./ 答案：【答案】B【解析】句意：看！地上有一把雨伞。考查不定冠词。a/an一，表示泛指，a用在辅音音素前，an用在元音音素前；the这，那，表特指；此处表示有一把雨伞，umbrella是元音音素开头的单词，故选B。Either the ways or the time________ yet,   but you may ask the headmaster for some information. [      ]A. isn't decided  B. hasn't decidedC. aren't decided  D. haven't decided