A．regularlyB．accidentallyC．sometimesD．successfullySulph……

单项选择题Have you got a spare pen

单项选择题I can hardly believe it, it's amazing.

单项选择题Below 600 feet ocean waters range from dimly lit to completely dark.

单项选择题She has such exceptional abilities that everyone is jealous of her.

单项选择题The old concerns lose importance and some of them vanish altogether;