you must calm.catch fire还是take fire?

you must calm.catch fire还是take fire? You must try to be calm可以说You must try calm吗 you must catch the ball换成祈使句 You must keep ______ when you are in danger.A.clamedB.calmC.calm downD.calms This is all you know,you must be calm in the face of you must catch the ball便祈使句怎么变? You must s___ calm when something happens suddenly这横线填什么, catch you If you want to catch the early bus ,you must be (hu ) If you have a chance___(get)the job ,you must catch it You must do you best _(catch)up with them 怎么填 Face dangers ,and you must keep calm first.这里and 怎么用啊,一般都翻成“那么”吗 It must be some catch. there is never a boat that you must catch.there is another boarding all the time. 用时态填空1、You must be careful.Silk__(catch)fire easily I must control my temper,calm down...I must control my temper,calm down 是什么意识? you are wet through ,you ___in the rain.选择题：A.must come B.must have caught C.may catch D.must have got caught 为什么选那个答案? 英语题 you are wet through ,you ___in the rain.A.must come B.must have caught C.may catch D.must have got caught 选择什么?为什么?