It's a must to have a good knowledge of English nowadays.(must前面为什么要用a)

It's a must to have a good knowledge of English nowadays.(must前面为什么要用a) It's fun to have a picnic,but they must get everything r______. it's getting late and i ____ go home A.must B.have to If you want to have high level of creativity,it's a must you have to be depressed.it's a must you 这是什么句式啊?为什么不是 you must It's too late,I ___ go home.A.must B.must to C.have to D.have 翻译并语法说明 It's time we( )to have dinner. A.have gone B.went C.will go D.must Let me have a look.Oh,it‘s six fifteen._____ to go to school.We must go.怎么填 单项选择 It's dark now.She A.have to goes home.B.has to go home.C.must to go home.D.must goes home. 单项选择 It's dark now.She A.have to goes home.B.has to go home.C.must to go home.D.must goes home I must go now.It's late.为什么用must而不用have to? could i use your book?i'm sorry but i( )use the book myself .i must finish it today .that's OK,i ( )borrow Lucy's A.must;could .B.have to ;can.C.have to;could.D.must;can. I like the party so much ,but I___go home .It's too late .A.must B .have to It's very warm outside You______to wear the coat A.must B.don't C.have to D.mustn't My hair is so long that I must go to a barber's shop and ____.A.have to cut it B.have it cut C.get it to be cut D.to cut it It's important to have a [ ] lifestyle. I can't get though to the general manager's office anyhowThe line is busy.Someone__the phone.A.must useB.usesC.must have been usingD.must it have been是B，为什么？ ( ) .It's ____ must to have ____ good kowledge of English nowdays.A.a;a B.a;an C.a;/ D./;a 选什么 并说明原因. It's a must to do sth.must在这里是什么词?意思是什么?