1000 sentences of today's English 并列题名：1000 sentences of today's English 100 key sentences of tourism English 900 key sentences of everyday English 并列题名：100 key sentences of tourism English 900 key sentences of business English 900 key sentences of cyber English 并列题名：900 key sentences of everyday English 100 Pearls of Modern English 并列题名：900 key sentences of business English