He must be ---- when he heard the exciting news

He must be ---- when he heard the exciting news When someone says keeping smiling,he must be in he must ( )here.《be》 He must be happy! a bus______(drive)must be careful when he is driving.用括号内的单词的适当形式填空. time,corrected,in,mistakes,the,be,must sun,is,he,rising,the,up,when,wake 连词成句 when he _____something useful,he wasted his time drawing little pictures.a.must have done b.shall be doing c.should be doing d.should have been doing when i must be home这句话对吗.课文里是when must i be home. He must be fun.何如改成一般疑问句?Must he be fun 还是Is he fun? He must be fun.何如改成一般疑问句?Must he be fun 还是Is he fun? 英语翻译he must be--------- ------------thirty years old He must be verg tired.变反意疑问句? He must be American等于什么 Where is he?He must还是must be on that island.选择题,是选 must 还是 must be.谢谢帮忙! he must be bad.he must be very wise.用either...or连接 The dentist thought he must be very.The dentist thought he must be very ill. He must be ill ,for he isn't here. He coughs _____-(terrible).He must be ill.