there _____ fights to other planets. a. may be b.must have c
there _____ fights to other planets. a. may be b.must have c
"Maybe there will be flights to other planets"是什么意思?
A.must be B.may have been C.can have been D.could be ,为什么呢,
She _____ a football fan.A、maybe B、may be C、must D、can
____ you come to my party?A can B may C must D have to
Be sure to help each other,______?A.aren't B.must you C.can'
Do I have to come back tomorrow?Yes,you_.A can B may C must
情态动词的.See who’s there!______ I t be Mary?A.May B.Must C.Can
I _____ have a fever,too maybe may be may may to
Who ------it be?It must be Mr.Wang A may B must C might D ca
may be difficult____with the people there.A.to talk B.talk C
You must be _nest time,or there may be another accident.A .c