Is Tom at home?No,Tom___be at home because he ___me from sha
Is Tom at home?No,Tom___be at home because he ___me from shanghai just now
A mustn't,called B can't,had called C mustn't,had called D can't,called
Would you like to give me a piece of paper____
All right,____ A to write on ,Here are you B to write on ,Here you are C to write,Here are you D to write,Here you are
Were you questioned bt that policeman?
No,Instead,I told him what____ next A to do B to be done
How long ____ you ____ the camera before you returned it?
A have,borrowed B had,borrowed C have,kept D had,kept
最好能简单叙述下为什么