Robert Collier once said, “A single idea——the sudden flash of a thought—— _________ be worth a million dollars.” A. should B. may C. must D, will
The old houses of this area had to be________immediately so that the government could carry its flowerstylecity programme out.
Children need friends________their own age to play with.
________we will do is to leave a note to tell Mum we will be back late.
Both________and________laughing do harm to your health.
The great artist Xu Beihong is famous for________to horses in his arts.