С.
find and correct the errors in these sentences. two of the sentences are correct.
1 may i to use your phone, please?
2 you don't have come to the exhibition.
3 you mustn't stay late tonight.
4 jack coulds help us, i think.
5 my boss doesn't can speak french.
6 you shouldn't working here so late.
7 i cant ring my boss now; he's already left.
8 shall i give you a hand?