our brains’ shift between being focused and unfocused定位至第8段段末处,our brains switch between being focused and unfocused,其中shift是switch的同义替换,由后半句 they tend to be more efficient得出正确答案为B. can bring about greater effcieny, 是对...
同样地,“be afraid(that)...”表示恐怕,后面可接上句子,如:I'm afraid I can't.一句在口语运用中省掉了“that”表示为恐怕不行; be afraid of (doing) something 担心做某事,如:she wa...
be accessible to 可接近的 be accustomed to 习惯于 be addicted to 对……有瘾 be afraid of 害怕 be allergic to 对……过敏 be amazed at 对……惊奇 be angry with/at sb at/about sth be annoyed with sb at/by/about sth 生气 be anxious about 担忧 for 渴望 ...
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