What if ____________ back?A.he come B.he comes C.does he come D.he dose come

What would I do if I ____________(上学迟到) What if ____________ back?A.he come B.he comes C.does he come D.he dose come if 句What will he say if he ever ____________ (discover) the truth?What will he say if he ever ____________ (discover) the truth?用discoversWe’ll just manage to catch the train if we _______ (leave) immediately.用 leaveI should be much obliged i Metal ____________ it.(you/heat/melts/if) If you don't know ____________ a problem,don’t be sad.Just think it over.If you don't know ____________ a problem,don’t besad.Just think it over.A.how to do with B.how to do C.what to do with D.what to do请问：C与D有何区别?为何不选B?a what..if 造句 what if there are what if用法急! What if什么意思? what if i need 谁知道What if... 这“what if i What if I have? what and if是什么意思 --Tomorrow is Sundy.What are you going to do?--____________.--If it's fine,let's go fishing.A.That depends on the weather.B.The weather depends on. these flowers are beautiful.改为感叹句,用how 还是what为什么 ____________ ____________ flowers! what if 和 why if 和how 15.What if,as if等用法