是英语高手得来,希望可以给我详细的解释,比如为什么不选ABC或D的!
1.A hinge joint is_____ permits the forward and backward moment of a door
A.that B.one C.something which D.what
2.The congress has insisted that the present law_____operate.
A.continued B.would continue C.continues D.continue
3.If he didn’t promise it yesterday,still he _____ it tomorrow
A.would not promise B.will not promise C.should not promise D.could not promise