1)i will be if he manages to sell that motorbike at a high price
A surprise B surprised C surprising D to surprise
2)unless you understand i explain it again to you
A am B was C will D would
3)if you know where she lives please let me
A know B knew C known D to know
4)if he a student he will get a discount
A is B was C were D will be
5) you are interested in this film don't go to see it at any cost
A if B unless C because D so
6)if you like that book i will give it you as my present
A for B from C at D to
7)if you live in this small town you earn much money
A aren't B couldn't C can't D didn't
8)if you have money you can travel abroad this summer
A a lot of B many C lot of D a lots
9)if you are a student you can get a discount books
A on B in C at D for
10)i won't go unless you me the money back
A to pay B paid C paying D pay