1.为什么只能用have the right to do stj 而不能have a right to do sth 2.become一直是系动词而多种用法如题

This is the last lesson that we have this term..为什么只能用that 不能用which?、 I have some problems finding out the answers为什么只能用finding而不能用to find 1.为什么只能用have the right to do stj 而不能have a right to do sth 2.become一直是系动词而多种用法如题 The meeting will begin in fifteen minutes.And there ___ many people in the hall.为什么只能用have been而不能用have had? Do you know how many people have walkde on the moon?为什么这句话只能用现在完成时? The parents will use ____they have to send their son to technical school 为什么只能用what ,而不用all 请问一句英语 关于yet和stillThey have been planning to attend the show,but they _____ have not had the opportunity.这里为什么不能用yet,只能用still呢? 为什么只能用whether ___we will go camping tomorrow depends on the weather.为什么不能用if?只能用whether Can you do the experiment ___another way为什么这里只能用in不能用by well dressed people have been ____to get more help 为什么只能用known 不用discovered The Smiths (have been living) here for ten years 为什么不能用 have been lived 定语从句 这里为什么只能用that而不能用which?我在打罗素的what I have lived for.但打出这句话I have sought it finally,because in the union of love I have seen,in a mystic miniature,the prefiguring vision of the heaven ×××× 为什么只能用by the hand 不能用by the hand?by her hand 打错了 为什么在The ____problem of our city is air pollution.中不能用worst?为什么只能用biggest/largest? 1._____they wanted to go out,they could always count on me to stay with baby.B.If C.On condition that if=On condition that 但为什么只能用If?2.The train leaves at 6;00 pm.So I have to be at the station______5:40pm at the latest.A.until B.C.by She is not the cheerfuf girl that she was.为什么只能用that引导,而不能用who? the question is（ that if ）it is worth doing that if 为什么不能用在这里,只能用whether