_____a mobile phone can you ring _______you want to talk with anywhere.[ ]

She’s too thin. She ________ gain some weight but she ________ too little. [ ]

Would you have helped her had it been possible?—Yes, but I __________ busy with my work

Be _______ — you can’t expect me to finish all thiswork in so little time

下列句子中，加点词的解释错误的一项是