Dirty air and water are harmful． They ____ kill plants， and even people．（ ）
A．canB．can'tC．shouldD．shouldn't
Dad， have you told Mum that I will come back next Wednesday？
No． Let's keep it and give her a surprise．（ ）
A．chanceB．choiceC．secretD．idea
The high﹣speed railway in this city last year． It is easier for people to travel now（ ）
A．will buildB．will be built
C．was builtD．built
Music has become a bridge the East and the West．（ ）
A．inB．atC．amongD．between
The tree is so high that I reach the apples on it．（ ）
A．can'tB．mustn'tC．shouldn'tD．needn't
I feel very ． May I have a cake？
Sure， you may take one from the fridge．（ ）
A．braveB．thirstyC．fullD．hungry